Declare Function CreateRectRgnIndirect Lib "gdi32.dll" (lpRect As RECT) As Long
Platforms: Win 32s, Win 95/98, Win NT
CreateRectRgnIndirect creates a rectangularly-shaped region and provides a handle to it. The rectangle defining the region is specified by the rectangle passed to the function. Note that the bottom and right edges of the rectangle are not considered to be part of the region. The function returns a handle to the newly created region if successful, or 0 if an error occured.
Example:
' Invert the pixels within a rectangular region on window Form1. The region
' has corners (20,30)-(150,110).
Dim therect As RECT ' rectangle used to create region
Dim hrgn As Long ' handle to the rectangular region
Dim retval As Long ' return value
' Set the rectangle to use to create the region.
retval = SetRect(therect, 20, 30, 150, 110) ' therect = (20,30)-(150,110)
' Create the rectangular region based on this rectangle.
hrgn = CreateRectRgnIndirect(therect)
' Invert the pixels within this region on Form1.
retval = InvertRgn(Form1.hDC, hrgn)
' Delete the region to free up resources.
retval = DeleteObject(hrgn)See Also: CreateRectRgn, CreateRoundRectRgn
Category: Regions
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