TRegionCombineMode

type TRegionCombineMode = (

  rgnAnd,

Create a region with the intersecting parts of the original regions.

  rgnCopy,

Create a region that is a copy of the first of the two original regions.

  rgnDiff,

Create a region with the area in the first region not found in the second region.

  rgnOr,

Create a region that represents both of the original regions.

  rgnXOR

Create a region with the areas from the original regions that do not overlap.

);