Microsoft Visual C# Programming: Application Online Help

	Microsoft Visual C# Programming: Application Online Help

Providing Help

Introduction

Providing help is one of the most neglected areas of application development. There are various reasons to this. Some programmers tend to think that help is such a small job that it should be left to non-programmers. This is not a valid argument since the person who creates an application knows it better than anybody.

Asking someone else to create help for your application would only slow the process because the other person would need to have new and more information about the application. Another reason is that, most programmers who want to take care of programming when creating an application think that they are working double to create a single program. This drives them to set this aspect aside and continue only with the application, thinking that they can come back to take care of help when the application is complete. What makes this unrealistic is that, sometimes when they finish the application, they are "tired".

There are various small but effective techniques you can use to provide help in your application: never neglect help.

Application: Introducing Help

Start Microsoft Visual Studio
To create a new application, on the main menu, click File -> New Project...
Select Windows Forms Application
Set the Name to ClarksvilleIceCream2
Click OK
To create a new form, on the main menu, click Project -> Add Windows Form...
In the Add New Item dialog box, set the name of the form to Calculation, and click Add

Design the new form as follows:

Clarksville Ice Scream - Difference Calculation

Control	Name	Text	Additional Properties
Label		Order Total:
TextBox	txtOrderTotal	0.00	TextAlign: Right Modifier: Public
Label		Amount Tended:
TextBox	txtAmountTended	0.00	TextAlign: Right
Button	btnCalculate	Calculate
Label		Difference:
TextBox	txtDifference	0.00	TextAlign: Right
Button	btnClose	Close

Double-click the Calculate button

Implement the Click event as follows:

private void btnCalculate_Click(object sender, EventArgs e)
{
    double totalOrder,
           amountTended = 0.00,
           difference;

    // Get the value of the total order. Actually, this value 
    // will be provided by the main form
    totalOrder = double.Parse(this.txtOrderTotal.Text);

    try
    {
        // The amount tended will be entered by the user
        amountTended = double.Parse(this.txtAmountTended.Text);
    }
    catch (FormatException)
    {
        MessageBox.Show("The amount you entered is not " +
                 "valid - Please try again!");
    }

    // Calculate the difference of both values, assuming 
    // that the amount tended is higher
    difference = amountTended - totalOrder;

    // Display the result in the Difference text box
    txtDifference.Text = difference.ToString("F");
}

Return to the Calculation form
Double-click the Close button

Implement the event as follows:

private void btnClose_Click(object sender, EventArgs e)
{
    Close();
}

In the Solution Explorer, right-click Form1.cs and click Rename
Type ClarksvilleIceCream.cs and press Enter
Right-click the form and click Properties
In the Properties window, change the form's Text to Clarksville Ice Cream

Design the form as follows:

Control	Name	Text	Additional Properties
GroupBox	grpIceCream
Label		Order Date:
TextBox	txtOrderDate
Label		Order Time:
TextBox	txtOrderTime
Label		Flavor:
TextBox	txtFlavor
Label		Container:
TextBox	txtContainer
Label		Ingredient:
TextBox	txtIngredient
Label		Scoops:
TextBox	txtScoops	1	TextAlign: Right
Label		Order Total:
TextBox	txtOrderTotal	0.00	TextAlign: Right
Button	btnCalculate	Calculate
Button	btnNewOrder	New Order
Button	btnMoneyChange	Money Change
Button	btnClose	Close

Double-click the Calculate Total button to access its Click event

Implement it as follows:

private void btnCalculate_Click(object sender, EventArgs e)
{
    double priceContainer = 0.00,
           priceIngredient = 0.00,
           priceScoops = 0.00,
           orderTotal = 0.00;
    int numberOfScoops = 1;

    // Find out what container the customer requested
    // The price of a container depends on which one the customer selected
    if (txtContainer.Text == "Cone")
        priceContainer = 0.55;
    else if (txtContainer.Text == "Cup")
        priceContainer = 0.75;
    else
        priceContainer = 1.15;

    // If the customer selected an ingredient, which is not "None", add $.95
    if (txtIngredient.Text != "None")
        priceIngredient = 0.95;

    try
    {
        // Get the number of scoops
        numberOfScoops = int.Parse(this.txtScoops.Text);

        if (numberOfScoops == 2)
            priceScoops = 2.55;
        else if (numberOfScoops == 3)
            priceScoops = 3.25;
        else
            priceScoops = 1.85;
    }
    catch (FormatException)
    {
        MessageBox.Show("The value you entered for the scoops is not valid" +
                        "\nOnly natural numbers such as 1, 2, or 3 are allowed" +
                        "\nPlease try again", "Clarksville Ice Cream",
                        MessageBoxButtons.OK, MessageBoxIcon.Information);
    }

    // Make sure the user selected a flavor, 
    // otherwise, there is no reason to process an order
    if (txtFlavor.Text != "")
        orderTotal = priceScoops + priceContainer + priceIngredient;

    txtOrderTotal.Text = orderTotal.ToString("F");
    btnMoneyChange.Enabled = true;
}

Return to the form

Double-click the New Order button to access its Click event and implement it as follows:

private void btnNewOrder_Click(object sender, EventArgs e)
{
    // If the user clicks New Order, we reset the form with the default values
    txtOrderDate.Text = DateTime.Today.ToShortDateString();
    txtOrderTime.Text = DateTime.Now.ToShortTimeString();
    txtFlavor.Text = "Vanilla";
    txtContainer.Text = "Cone";
    txtIngredient.Text = "None";
    txtScoops.Text = "1";
    txtOrderTotal.Text = "0.00";
    btnMoneyChange.Enabled = false;
}

Return to the form
Double-click the Money Change button

Implement the Click event as follows:

private void btnChange_Click(object sender, EventArgs e)
{
    // Declare a variable for the Calculation form
    Calculation dlgCalculation = new Calculation();

    // Transfer the current value of the Order Total text 
    // box from the main form to the other form
    dlgCalculation.txtOrderTotal.Text = this.txtOrderTotal.Text;
    // Display the other form
    dlgCalculation.ShowDialog();
}

Change the Click events of the Calculate Total and the New Order buttons as follows:
```
private void btnClose_Click(object sender, EventArgs e)
{
    Close();
}
```
To save the application, on the main menu, click File -> Save All
Accept the default location and the name. Click Save
To test the application, on the main menu, click Debug -> Start Debugging
Close the form and return to Visual Studio

Status Bar Messages

One way you can provide simple help consists of displaying short indicative messages on a status bar. To do this, you can first create sections, called panels, on a status bar and then display the necessary messages in the section of your choice. The message can be anything but it should consist of just a few words to fit in its section without going over board.

Application: Helping Through a Status Bar

Expand the bottom border of the form a little bit
On the Toolbox, click StatusStrip and click the bottom section of the form
In the Properties window, click Items and click its ellipsis button
In the Select Item and Add to List Below combo box, select StatusLabel if necessary and click Add
On the right side, set the Text to Ready
Click OK
On the form, click the txtOrderDate control; that is, the text box on the right side of the Order Date label
In the Properties window, click the Events button and double-click MouseMove
Return to the form
In the same way, initiate the MouseMove event of the txtOrderTime, the txtFlavor, the txtContainer, the txtIngredient combo box, the txtScoops, the txtOrderTotal text boxes, and the form

Implement the events as follows:

private void txtOrderDate_MouseMove(object sender, MouseEventArgs e)
{
    statusStrip1.Items[0].Text = "Specify the date this order was processed";
}

private void txtOrderTime_MouseMove(object sender, MouseEventArgs e)
{
    statusStrip1.Items[0].Text = "Specify the time this order was processed";
}

private void txtFlavor_MouseMove(object sender, MouseEventArgs e)
{
    statusStrip1.Items[0].Text = "Enter the customer's desired flavor";
}

private void txtContainer_MouseMove(object sender, MouseEventArgs e)
{
    statusStrip1.Items[0].Text = "Enter the type of object that will contain the ice cream";
}

private void txtIngredient_MouseMove(object sender, MouseEventArgs e)
{
    statusStrip1.Items[0].Text = "Enter an ingredient to spice the ice cream";
}

private void txtScoops_MouseMove(object sender, MouseEventArgs e)
{
    statusStrip1.Items[0].Text = "Enter the number of scoops to fill the container";
}

private void txtOrderTotal_MouseMove(object sender, MouseEventArgs e)
{
    statusStrip1.Items[0].Text = "This displays the total of the order";
}

Return to the form and click an unoccupied area of the form
In the Events section of the Properties, double-click MouseMove

Implement the as follows:

private void ClarksvilleIceCream_MouseMove(object sender, MouseEventArgs e)
{
    statusStrip1.Items[0].Text = "Ready";
}

Return to the form and click a border of the top group box
In the Events section of the Properties, double-click MouseHover

Implement the event as follows:

private void gbxIceCreamOrder_MouseHover(object sender, EventArgs e)
{
    this.statusStrip1.Items[0].Text = "Ready";
}

Return to the form and click a border of the bottom group box
In the Events section of the Properties, double-click MouseHover

Implement the event as follows:

private void gbxFileProcessing_MouseHover(object sender, EventArgs e)
{
    this.statusStrip1.Items[0].Text = "Ready";
}

Test the application
After using it, close the form and return to your programming environment

Tool Tips

A tool tip is a small yellow box that displays a word or a group of words when the user positions the mouse on top of a control:

To create a tool tip system in a Visual Studio 2010 application, first add a ToolTip control to a form. After adding a ToolTip control, the form and all controls on it receive a new field in the Properties window. If the new ToolTip control is called ToolTip1, the new field in the Properties window for each control is ToolTip on ToolTip1. To display a tool tip for a control, first click it on the form. Then, in the Properties window, click ToolTip on ToolTip1, and type the desired tool tip.

Application: Adding Tool Tips

To prepare for tool tips, in the Common Controls section of the Toolbox, click ToolTip and click the form

On the form, click each control and, in the Properties window, set its ToolTip On ToolTip property as follows:

Control	ToolTip On ToolTip1
txtOrderDate	Enter a value for a date (MM/DD/YYYY)
txtOrderTime	Enter a value for a time (23:59)
txtFlavor	Type the ice cream flavor the customer wants
txtContainer	Enter the type of container to hold the ice cream
txtIngredient	Enter the ingredient the customer wants. If the customer doesn't want any, type None
txtScoops	Enter the number of scoops (1, 2, or 3) to fill the container
txtOrderTotal	This displays the total amount of this order
btnCalculate	Click here to calculate the total of the order
btnNewOrder	Click here to reset the form
btnMoneyChange	Click here to calculate the change
btnClose	Click here to close the form

Test the application
Position the mouse on one of the buttons and see the tool tip
Close the form and return to your programming environment

Online Help

Introduction

Online help is the system of providing help files with an application. Online help is usually available from the main menu through a menu group created under a Help category.

In the past, the techniques to provide or program online help were not always easy. The early implementations of help were created in a system called WinHelp. This required using a Rich Text Format (rtf) file and appropriately formatting it. It is possible that, when folks at Microsoft developed WinHelp, they had only Microsoft Word in mind. It was difficult to get the required file ready if you were using another application such as WordPad or WordPerfect... Creating the help file was not enough. Once the file was ready, it had to be added to the application, and appropriately. This back and forth gymnastic was a great motivation for neglect. As if these difficulties were not enough, or because of these difficulties, Microsoft created another system called HTML Help. This neither solved most problems nor created an easier solution. At this time, this HTML Help is widely used and many companies, such as AutoDesk (AutoCAD) and Macromedia to name just two, have adopted it . Many companies such as Borland, Jasc, just to name two, are still using WinHelp. This indicates that HTML Help didn't solve all problems and was not anonymously adopted.

Because HTML Help is the most supported help system by Microsoft, we will use it. Also, it is easier to use HTML Help in a Microsoft Visual Studio 2010 application than to use WinHelp.

The Help Provider

Context-sensitive help allows the user to get local help on a particular control. This works by the user who can first click a control and then press Shift+F1. This displays a yellow box with a word or a group of words:

This help is easier to provide in a dialog box because a dialog has a feature not available on a form. It consists of adding a button with a question mark and then creating the words that would display eventually. When you create this type of dialog box, the user can click the question marked button and click a control. The user can also press Shift+F1. This causes the mouse pointer to be equipped with a question mark. The user can then click a control and a yellow box would appear for that control, providing help.

Help

To make it easy to provide online help in a Visual Studio 2010application, the .NET Framework provides the HelpProvider control. After adding this control to the application, the form and all controls on it receive a new property labeled HelpString On HelpProvider1. You can then type the desired string in the field of the Properties window for each control that would display context-sensitive help.

Application: Using Context-Sensitive Help

In the Solution Explorer, double-click Calculation.cs to display that form
Change the following values of the form in the Properties window:
FormBorderStyle: FixedDialog
HelpButton: True
MaximizeBox: False
MinimizeBox: False
ShowInTaskbar: False
In the Components section of the Toolbox, click HelpProvider and click the form

Using the Properties window, change the following values for the indicated controls:

Control	HelpString On HelpProvider1
txtOrderTotal	This is the total amount of the current order
txtAmountTended	This is the amount the customer tended
btnCalculate	Click here to calculate the difference between the amount tended and the total price of the order
txtDifference	This displays the difference between the amount tended and the total of the order
btnClose	Click here to close the dialog box

Execute the application
When it displays, process an order and click the Calculate Difference button
In the Calculation dialog box, click the question mark button in the title bar and click on the text boxes or buttons
After using the application, close the forms and return to your programming environment
To display the main form, click the ClarksvilleIceCream.cs [Design] label
To add a menu to the application, on the Toolbox, click MenuStrip and click the form
On the form, click Type Here. Type &File and press the down arrow key
Type E&xit and press Enter
On the right side of File (on the form), click Type Here
Type &Help and press the down arrow key
Type &Contents... and press the down arrow key
Type &Index... and press the down arrow key
Type &Search... and press Enter
On the form, click File and double-click Exit

Implement its event as follows:

private void exitToolStripMenuItem_Click(object sender, EventArgs e)
{
    Close();
}

Test the application then close it and return to Visual Studio

Introduction to HTML Help

The online help we described above provides only small yellow boxes. It is called context-sensitive because it provides its assistance on only a control of the form. Another technique, in fact highly supported with any commercial program, consists of providing an external application that resembles a book. This allows the user to get more detailed information about almost any aspect of the application.

To provide online help in a Visual Studio 2010 application, you can use an external system. This consists of creating a complete application whose only purpose is to describe another application. This means that, in the beginning, both applications are not related in any way. With HTML Help, you must first create HTML files. You create these files anyway you like but, in this case, they are meant to provide support for a specific application. Therefore, when creating the files, try to divide them by issues. For example, you can create a file for each form of your application and use that file to describe what the form or dialog box is used for. You still can use any approach to create the files you would need. Experience will guide you eventually into knowing what to put in those files.

After creating the HTML files, you can open HTML Help Workshop which is a complete but separate application. This application is freely available from Microsoft and you can download it from the MSDN web site.

Application: Creating an HTML Help File

Using Windows Explorer or My Computer, create a folder named cic
Inside of the cic folder, create a folder named images
Save the following pictures in the cic\images folder:

Start Notepad and create a Cascading Style Sheet file to format the body tag and the main title of the pages. Here is an example:

body
{
	font-size: 10pt;
	color: black;
	margin-top: 0pt;
	margin-left: 0pt;
	font-family: Verdana, Tahoma, Arial, Sans-Serif;
}

.maintitle
{
	font-weight: bold;
	font-size: 24pt;
	color: blue;
	font-family: Garamond, Georgia, 'Times New Roman' , Serif;
}

Save the file as cic.css in the cic folder you created

Start another file with the following contents

<html>

<head>

<link rel="stylesheet" type="text/css" href="cic.css">

<title>Overview of Clarksville Ice Cream</title>
</head>

<body>

<table border="0" width="100%" cellspacing="0" cellpadding="0">
  <tr>
    <td width="100%" align="center">
      <p class="maintitle">Overview of Clarksville Ice Cream</p></td>
  </tr>
  <tr>
    <td width="100%" bgcolor="#0000FF" height="2"></td>
  </tr>
</table>

<p>&nbsp;</p>
<center><img border="0" src="images/order.gif"
         alt="The main window of the application"
	 width="416" height="284"></center>
<p>Clarksville Ice Cream is a computer application used to process customers
orders. It allows an employee to receive requests from a customer, based on what
is available in the menu. When the order is complete, an ice cream is
&quot;prepared&quot; and handed to the customer. As a commercial business, the
application calculates the total amount. The amount is read to the customer who
hands money to the clerk to complete the transaction</p>

</body>

</html>

Save it as introduction.htm

Start another file with the following contents

<html>

<head>

<link rel="stylesheet" type="text/css" href="cic.css">

<title>Customer Order Form</title>
</head>

<body>

<table border="0" width="100%" cellspacing="0" cellpadding="0">
  <tr>
    <td width="100%" align="center">
      <p class="maintitle">Customer Order Form</p>
    </td>
  </tr>
  <tr>
    <td width="100%" bgcolor="#0000FF" height="2"></td>
  </tr>
</table>

<p>&nbsp;</p>
<p>The main or opening window of this application displays a form used to
process customers orders. The top section of the form, also called the title
bar, is equipped with a menu called the main menu. this menu allows the user to
start a new order or to close the application. To use this main menu, you can
click one of the top-level words such as File. This causes the menu category of
your choice to expand:</p>
<center>
  <img border="0" src="images/mainmenu.gif"
   alt="The main menu" width="416" height="284"></center>
<p>After using a menu item, you can click it or click somewhere else to collapse
it.</p>

<p>The other objects on the main form allow the user to process an order by
selecting items from the Windows controls. Once an order is ready, the user can
click the Calculate Total button. This evaluates the total price of the order
and displays it in the text box on the right side of Order Total.</p>

<p>To start a new customer order, the user can click the New Order button. This
resets all controls on the form:</p>

<center>
   <img border="0" src="images/empty.gif" 
    alt="Customer Form Reset" width="416" height="284"></center>

<p>When an order has been calculated, the user can click the Calculate
Difference button to evaluate the difference.</p>

</body>

</html>

Save it as mainform.htm

Start another file with the following contents

<html>

<head>

<link rel="stylesheet" type="text/css" href="cic.css">

<title>Difference Calculation</title>
</head>

<body>

<table border="0" width="100%" cellspacing="0" cellpadding="0">
  <tr>
    <td width="100%" align="center">
      <p class="maintitle">Difference Calculation</p>
    </td>
  </tr>
  <tr>
    <td width="100%" bgcolor="#0000FF" height="2"></td>
  </tr>
</table>

<p>&nbsp;</p>
<p>The Calculation dialog box allows a user to easily calculate the amount of
money owed to a customer. After a customer has placed an order and given money
to the clerk, the user can display this dialog box. When it comes up, the top
text box of this window already displays the amount of the customer's order. The
user can then simply enter the amount the customer gave in the Amount Tended
text box. Then the user can click Calculate</p>
<center>
  <img border="0" src="images/calculation.gif"
   width="304" height="152"></center>
<p>When the user has clicked the Calculate button, it calculates the difference
and displays it in the Difference text box. After using this dialog box, the
user can close it by clicking Close.</p>
<p>&nbsp;</p>

</body>

</html>

Save it as calculation.htm

Start another file with the following contents

<html>

<head>

<title>Clarksville Ice Cream - Home</title></head>

<body>
<h1>Clarksville Ice Cream</h1>
<p><a href="introduction.htm">Introduction</a></p>
<p><a href="mainform.htm">The Main Form</a></p>
<p><a href="calculation.htm">The Difference Calculation Dialog Box</a></p>
</body>

</html>

Save it as index.htm
Start HTML Help Workshop
On the main menu of HTML Help Workshop, click File -> New
In the New dialog box, make sure Project is selected and click OK
In the first page of the New Project wizard, click Next
In the second page of the wizard, click Browse
Locate the cic folder you created and display its contents
Set the File Name to IceCream
Click Open
In the second page, click Next
In the third page, read the text. Click the HTML files (.htm) check box and click Next
In the fourth page, click Add
In the Open dialog box, press and hold Ctrl. Then click each htm file to select them all
Click Open
In the fourth page, click Next
In the last page of the wizard, click Finish
In HTML Help Workshop, click the Contents tab
In the dialog box that displays, make sure the first radio button is selected
Click OK
In the Save As dialog box, accept the suggested name
Click Save
Click the Insert a Heading button
In the Table Of Contents Entry dialog box, in the Entry Title text box, type Clarksville Ice Cream and click Add
In the Path Or URL dialog box, select the Clarksville Ice Cream - Home
Click OK
Click OK
Click the Insert A Page button
In the message box that displays, read it and click No
In the Entry Title text box, type Introduction and click Add
In the Path Or URL dialog box, select the Overview of Clarksville Ice Cream and click OK
In the Table Of Contents Entry dialog box, click OK
In the same way, create new pages under the Introduction heading using the following table

New Page Title Page or URL

Customer Order Form Customer Order Form

Difference Calculation Difference Calculation
In HTML Help Workshop, click the Index tab. In the dialog box that comes up, make sure the top radio button is selected
Click OK
Accept the suggested name of the file and press Enter
Click Insert A Keyword
In the Keyword text box, type Calculation and click Add
In the Path Or URL dialog box, click Difference Calculation and click OK twice

In the same way, create new keywords using the following table (sometimes you may receive a message box asking whether you want to create the keyword above the other; it doesn't matter, for this exercise, whether you click Yes or No):

New Keyword	Page or URL
amount	Difference Calculation
money	Difference Calculation
customer	Difference Calculation
order	Difference Calculation
clerk	Difference Calculation
window	Difference Calculation
Amount Tended	Difference Calculation
Calculate	Difference Calculation
Close	Difference Calculation
computer	Overview of Clarksville Ice Cream
Application	Overview of Clarksville Ice Cream
employee	Overview of Clarksville Ice Cream
menu	Overview of Clarksville Ice Cream
commercial	Overview of Clarksville Ice Cream
business	Overview of Clarksville Ice Cream
transaction	Overview of Clarksville Ice Cream
Main Menu	Customer Order Form
category	Customer Order Form
choice	Customer Order Form

Click the Sort Keywords Alphabetically button
Click the Project tab
Click the Add/Modify Window Definitions button
Set the name to MainWnd and press Enter
Set the Title Bar Text to Clarksville Ice Cream
Click the Buttons tab then click the Home and the Locate check boxes
Click the Position tab
Set the Width to 800 and the Height to 600
Click the Files tab
Set the Default and the Home choices to index.htm
Click Navigation Pane
Click the Search Tab and the Advanced check boxes
Click OK
When the Resolve Window Definition wizard comes up, in the first page, make sure the window defined previously is selected in the Window Type and click Next
Click Compile Full-Text Information
Click Next
In the second page, accept the defaults and click Next
In the third page, accept the default and click Finish
To create the help file, click the Save All Files And Compile button
When the compilation is over, close the HTML Help Workshop window

HTML Help and Windows Applications

After creating the HTML Help application, you can use a HelpProvider control to connect it to your application. The HelpProvider control is equipped wit the HelpNamespace provider. This property allows you to specify the application that contains the help application. Besides the HelpNamespace property, the HelpProvider control provides various methods to manage help.

HTML Help can be provided to a Visual Studio 2010 application through the Help class. The overloaded ShowHelp() method is used to specify the help file to display and possibly additional information. Notice that all versions take a first argument as a Control type. This is the parent control from where the online help will be provided.

The first version allows you specify the help file. It can be the help file specified in the HelpProvider.HelpNamespace property mentioned above.

The second and the fourth versions allow you to specify the tab of the HTML Help window to display when the method is called. This is done through the HelpNavigator enumerator that has a value for each tab of the HTML Help window. the fourth version can be used to open the HTML Help window from its Find tab and specify a keyword to search for.

The third version can be used to open a help file based on a keyword.

The ShowHelpIndex() method can be used to open the Index tab of the HTML Help window.

Application: Providing Online Help to an Application

Open Windows Explorer or My Computer
In the cic folder, copy the IceCream.chm file to the clipboard and paste it in the folder of the current project (ClarckvilleIceCream1)
In Microsoft Visual Studio, display the main form
In the Components section of the Toolbox, click HelpProvider and click the form
In the Properties window, change its Name to hpvIceCream and click HelpNamespace
Click the ellipsis button of the HelpNamespace property
From the folder of the current project, select the IceCream.chm file
Click Open
On the main menu of the form, click Help and double-click Contents

Implement the event as follows:

private void contentsToolStripMenuItem_Click(object sender, EventArgs e)
{
    Help.ShowHelp(this, hpvIceCream.HelpNamespace);
}

Display the ClarksvilleIceCream form
On the main menu of the form, double-click Index

Implement the event as follows:

private void indexToolStripMenuItem_Click(object sender, EventArgs e)
{
    Help.ShowHelpIndex(this, hpvIceCream.HelpNamespace);
}

Return to the form
On the main menu of the form, double-click Search

Implement the event as follows:

private void searchToolStripMenuItem_Click(object sender, EventArgs e)
{
    Help.ShowHelp(this, hpvIceCream.HelpNamespace, HelpNavigator.Find, "");
}

Execute the application
When it displays, click the Help menu of the form and click one of the menu items
After using it, close the online help window, close the form, and return to your programming environment
Close Microsoft Visual Studio. If you are asked whether you want to save the project, click Yes


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