Graphics.Win32.GDI.Region
badRegion
combineRgn
offsetRgn
getRgnBox
createEllipticRgn
createEllipticRgnIndirect
createRectRgn
createRectRgnIndirect
createRoundRectRgn
createPolygonRgn
fillRgn
invertRgn
paintRgn
frameRgn
ptInRegion
rectInRegion