Form.ShowWithoutActivation Property

Gets a value indicating whether the window will be activated when it is shown.

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

[BrowsableAttribute(false)]
protected virtual bool ShowWithoutActivation { get; }

Property Value

Type: System.Boolean
True if the window will not be activated when it is shown; otherwise, false. The default is false.

Use this property if you want to show a top-level window, but don't want to interrupt a user's work by taking the input focus away from the current window. This can be an informational pop-up window or a floating window, such as a Tools palette in the Paint application.

Because this property is read-only, you can only change its value by overriding ShowWithoutActivation in your own form, and programming it to return true.

If your non-activated window needs to use UI controls, you should consider using the ToolStrip controls, such as ToolStripDropDown. These controls are windowless, and will not cause a window to activate when they are selected.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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