WinGetClipPS - Parameters

hwnd (HWND) - input

Handle of window for which the presentation space is required.

hwndClipWindow (HWND) - input

Handle of window for clipping.

Values to be specified can be one of the following:

HWND_BOTTOM

Clip the last window in the sibling chain and continue clipping until the next window is hwnd or NULLHANDLE.
HWND_TOP
Clip the first window in the sibling chain and continue clipping until the next window is hwnd or NULLHANDLE.
NULLHANDLE
Clip all siblings to the window hwnd.

ulClipflags (ULONG) - input

Clipping control flags.

PSF_CLIPSIBLINGS

Clip out all siblings of hwnd.
PSF_CLIPCHILDREN
Clip out all children of hwnd.
PSF_CLIPUPWARDS
Taking hwndClipWindow as a reference window, clip out all sibling windows before hwndClipWindow. This value may not be used with PSF_CLIPDOWNWARDS.
PSF_CLIPDOWNWARDS
Taking hwndClipWindow as a reference window, clip out all sibling windows after hwndClipWindow. This value may not be used with PSF_CLIPUPWARDS.
PSF_LOCKWINDOWUPDATE
Calculate a presentation space that keeps a visible region even though output may be locked by the WinLockWindowUpdate function.
PSF_PARENTCLIP
Calculate a presentation space that uses the visible region of the parent of hwnd but with an origin calculated for hwnd.

hps (HPS) - returns

Presentation-space handle that can be used for drawing.

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