Sets the color key (transparency range) for a specified category on a GdPicture image. This method sets the high and low color-key values so that a range of colors can be made transparent. Any color that has each of its three components (red, green, blue) between the corresponding components of the high and low color keys is made transparent.

'Declaration
 
Public Function SetColorKey( _
   ByVal ImageID As Integer, _
   ByVal ColorLow As Color, _
   ByVal ColorHigh As Color _
) As GdPictureStatus

public GdPictureStatus SetColorKey( 
   int ImageID,
   Color ColorLow,
   Color ColorHigh
)

public function SetColorKey( 
    ImageID: Integer;
    ColorLow: Color;
    ColorHigh: Color
): GdPictureStatus; 

public function SetColorKey( 
   ImageID : int,
   ColorLow : Color,
   ColorHigh : Color
) : GdPictureStatus;

public: GdPictureStatus SetColorKey( 
   int ImageID,
   Color ColorLow,
   Color ColorHigh
) 

public:
GdPictureStatus SetColorKey( 
   int ImageID,
   Color ColorLow,
   Color ColorHigh
)