This section describes the management of bitmaps with an alpha layer. API AlphaBitmap _CPalphaBitmap _CRalphaBitmap _DSalphaBitmap _GETalphaBitmapBackground _GETalphaBitmapSize _GETalphaBitmapTransparency _LDalphaBitmap _SCPalphaBitmap _SETalphaBitmapBackground _SETalphaBitmapTransparency