Focusing on Forms and Menus in Visual Basic - 4.19 Creating Shortcut Menus
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Problem

You want to display a custom shortcut menu to users when they right-click on a form or one of its controls.

Solution

Sample code folder: Chapter 04\ShortcutMenus 

Use theContextMenuStrip control to design a shortcut menu (also called a context or pop-up menu) that you can attach to the controls (or form) of your choice.

Create a new Windows Forms application, and add aContextMenuStripcontrol namedMainShortcutMenu to the form. When you select that control, it adds a temporary standard menu to the control that you can use to add new menu items (see Figure 4-20).

Figure 4-20.  Shortcut menus in design mode

Add two menu items to this shortcut menu:

• A menu item namedMenuHello, usingSay Hellofor itsText property
  
• A menu item namedMenuGoodbye, usingSay Goodbyefor itsTextproperty

Select the form itself, and then change itsContextMenuStripproperty toMainShortcutMenu.

Now, add the following source code to the form’s code template:

  Private Sub MenuHello_Click(ByVal sender As System.Object,_
        ByVal e As System.EventArgs) Handles MenuHello.Click
     MsgBox("Hello")
  End Sub

  Private Sub MenuGoodbye_Click(ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles MenuGoodbye.Click
     MsgBox("Goodbye")
  End Sub

Run the program, and right-click on the form. The shortcut menu will present itself, as shown in Figure 4-21. Clicking on the items puts up a message box saying “Hello” or “Goodbye.”

Figure 4-21.  The shortcut menu in use

Discussion

Each form and control includes a ContextMenuStrip property that you can assign to any ContextMenuStrip control included with your form. You can create as many shortcut menus as needed for your controls.

Some controls, such as theTextBoxcontrol, already include default shortcut menus. If you wish to enhance one of these menus, you will have to design your own menu from scratch and provide your own implementations for menu items previously found in that control’s shortcut menu.

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