ToolStripDropDown.AutoClose Property

Note: This property is new in the .NET Framework version 2.0.

Gets or sets a value indicating whether the ToolStripDropDown control should automatically close when it has lost activation.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in

Public Property AutoClose As Boolean
Dim instance As ToolStripDropDown
Dim value As Boolean

value = instance.AutoClose

instance.AutoClose = value
/** @property */
public boolean get_AutoClose ()

/** @property */
public void set_AutoClose (boolean value)

public function get AutoClose () : boolean

public function set AutoClose (value : boolean)

Property Value

true if the ToolStripDropDown control automatically closes; otherwise, false. The default is true.

If you want a ToolStripDropDown that always stays open, set AutoClose to false.


Consider handling the Closing event instead of setting the AutoClose property. Inspect the CloseReason field in your Closing handler to specify custom closing logic.

The following code example demonstrates how to toggle the value of the AutoClose property in response to a check box selection.

' This method toggles the value of the ToolStripDropDown 
' control's AutoClose property.
Private Sub autoCloseCheckBox_CheckedChanged(sender As Object, e As EventArgs) Handles autoCloseCheckBox.CheckedChanged
   Me.contextMenuStrip1.AutoClose ^= True
 End Sub

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0