Raster Image Functions:
 Region Processing
  Creating and Using a Region

For creating a region:

L_AutoSegmentBitmap

L_SetBitmapRgnBorder

L_SetBitmapRgnColor

L_SetBitmapRgnColorHSVRange

L_SetBitmapRgnColorRGBRange

L_SetBitmapRgnCurve

L_SetBitmapRgnEllipse

L_SetBitmapRgnFromMask

L_SetBitmapRgnHandle

L_SetBitmapRgnMagicWand

L_SetBitmapRgnPolygon

L_SetBitmapRgnRect

L_SetBitmapRgnRoundRect

L_SliceBitmap

L_SetKaufmannRgnBitmap

For working with the current region:

L_BitmapHasRgn

L_ColorBitmapRgn

L_CreateMaskFromBitmapRgn

L_FrameBitmapRgn

L_FreeBitmapRgn

L_GetBitmapClipSegments

L_GetBitmapClipSegmentsMax

L_GetBitmapRgnArea

L_GetBitmapRgnBounds

L_GetBitmapRgnHandle

L_GetRgnContourPoints

L_GetRgnPerimeterLength

L_HolesRemovalBitmapRgn

L_IsPtInBitmapRgn

L_OffsetBitmapRgn

L_SetBitmapRgnCurve

Regions are not supported on Windows CE.

See Also

Implementing Transparency

L_ResizeBitmapRgn