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ControlPaint.CreateHBitmapTransparencyMask Method

Creates a color mask for the specified bitmap that indicates which color should be displayed as transparent.

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

[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)]
public static IntPtr CreateHBitmapTransparencyMask(
	Bitmap bitmap


Type: System.Drawing.Bitmap

The Bitmap to create the transparency mask for.

Return Value

Type: System.IntPtr
The handle to the Bitmap mask.

You are responsible for de-allocating the bitmap.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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