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how-to-handle-the-contextmenustrip-opening-event.md

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How to: Handle the ContextMenuStrip Opening Event
Learn how to handle the ContextMenuStrip Opening event, which adds items dynamically to a ContextMenuStrip control.
03/30/2017
csharp
vb
ContextMenuStrip control [Windows Forms]
context menus [Windows Forms], event handling
ToolStrip control [Windows Forms]
event handling [Windows Forms], context menus
shortcut menus [Windows Forms], event handling
b661b3dd-7815-4cc2-a1aa-a9a391ab3427

How to: Handle the ContextMenuStrip Opening Event

You can customize the behavior of your xref:System.Windows.Forms.ContextMenuStrip control by handling the xref:System.Windows.Forms.ToolStripDropDown.Opening event.

Example

The following code example demonstrates how to handle the xref:System.Windows.Forms.ToolStripDropDown.Opening event. The event handler adds items dynamically to a xref:System.Windows.Forms.ContextMenuStrip control. For the complete code example, see How to: Add ToolStrip Items Dynamically.

[!code-csharpSystem.Windows.Forms.ToolStrip.Misc#42] [!code-vbSystem.Windows.Forms.ToolStrip.Misc#42]

Set the xref:System.ComponentModel.CancelEventArgs.Cancel%2A?displayProperty=nameWithType property to true to prevent the menu from opening.

See also

  • xref:System.Windows.Forms.ContextMenuStrip
  • xref:System.ComponentModel.CancelEventArgs.Cancel%2A
  • xref:System.Windows.Forms.ToolStripDropDown
  • ToolStrip Control