WinBeginPaint - Parameters

hwnd (HWND) - input

Handle of window where drawing is going to occur.

HWND_DESKTOP

The desk top window.
Other
Specified window.

hps (HPS) - input

Presentation-space handle.

NULLHANDLE

Obtain a cache presentation space.
Other
Presentation-space handle. This function sets its clipping region to the update region of the hwnd parameter.

prclPaint (PRECTL) - output

Bounding rectangle.

Note: The value of each field in this structure must be in the range -32 768 through 32 767. The data type WRECT can also be used, if supported by the language.

NULL

No bounding rectangle; that is, there is no need of changing any point.
Other
Specifies the smallest rectangle bounding the update region, in window coordinates.

hpsPaintPS (HPS) - returns

Presentation-space handle.

NULLHANDLE

Error occurred
Other
Presentation-space handle.

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