GdPictureImaging.GetAlphaChannel Method

Stores into an array of byte the Alpha channel of a GdPicture image.

public GdPictureStatus GetAlphaChannel(
    int ImageID, 
    ref Byte arPixels, 
    int SrcLeft, 
    int SrcTop, 
    int Width, 
    int Height
);

Visual Basic

Public Function GetAlphaChannel(
    ByVal ImageID As Integer, 
    ByRef arPixels() As Byte, 
    ByVal SrcLeft As Integer, 
    ByVal SrcTop As Integer, 
    ByVal Width As Integer, 
    ByVal Height As Integer
) As GdPictureStatus

Parameters

Parameters	Description
ImageID	GdPicture Image Identifier.
arPixels	Output parameter. Array of alpha components.
SrcLeft	The left source pixel of the area.
SrcTop	The top source pixel of the area.
Width	The width of the area in pixel.
Height	The height of the area in pixel.

Returns

A member of the GdPictureStatus enumeration.