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dotnet-desktop-guide/framework/winforms/controls/how-to-add-toolstrip-items-dynamically.md
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---
title: "How to: Add ToolStrip Items Dynamically"
ms.date: "03/30/2017"
dev_langs:
- "csharp"
- "vb"
helpviewer_keywords:
- "ContextMenuStrip control [Windows Forms]"
- "toolbars [Windows Forms], adding items dynamically"
- "ToolStrip control [Windows Forms]"
ms.assetid: 0e8dea56-5f46-408b-914d-7e360341a234
---
# How to: Add ToolStrip Items Dynamically
You can dynamically populate the menu item collection of a <xref:System.Windows.Forms.ToolStrip> control when the menu opens.
## Example
The following code example demonstrates how to dynamically add items to a <xref:System.Windows.Forms.ContextMenuStrip> control. The example also shows how to reuse the same <xref:System.Windows.Forms.ContextMenuStrip> for three different controls on the form.
In the example, an <xref:System.Windows.Forms.ToolStripDropDown.Opening> event handler populates the menu item collection. The <xref:System.Windows.Forms.ToolStripDropDown.Opening> event handler examines the <xref:System.Windows.Forms.ContextMenuStrip.SourceControl%2A?displayProperty=nameWithType> and <xref:System.Windows.Forms.ToolStripItem.OwnerItem%2A?displayProperty=nameWithType> properties and adds a <xref:System.Windows.Forms.ToolStripItem> describing the source control.
[!code-csharp[System.Windows.Forms.ToolStrip.Misc#1](~/samples/snippets/csharp/VS_Snippets_Winforms/System.Windows.Forms.ToolStrip.Misc/CS/Program.cs#1)]
[!code-vb[System.Windows.Forms.ToolStrip.Misc#1](~/samples/snippets/visualbasic/VS_Snippets_Winforms/System.Windows.Forms.ToolStrip.Misc/VB/Program.vb#1)]
[!code-csharp[System.Windows.Forms.ToolStrip.Misc#40](~/samples/snippets/csharp/VS_Snippets_Winforms/System.Windows.Forms.ToolStrip.Misc/CS/Program.cs#40)]
[!code-vb[System.Windows.Forms.ToolStrip.Misc#40](~/samples/snippets/visualbasic/VS_Snippets_Winforms/System.Windows.Forms.ToolStrip.Misc/VB/Program.vb#40)]
## Compiling the Code
This example requires:
- References to the System.Drawing and System.Windows.Forms assemblies.
## See also
- <xref:System.Windows.Forms.ContextMenuStrip>
- <xref:System.Windows.Forms.MenuStrip>
- <xref:System.Windows.Forms.ToolStrip>
- <xref:System.Windows.Forms.ToolStripItem>
- <xref:System.Windows.Forms.ToolStripMenuItem>
- <xref:System.Windows.Forms.ToolStripDropDownButton>
- [ToolStrip Control](toolstrip-control-windows-forms.md)