## Presentation Device Driver Reference for OS/2

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### GreGetClipBox Parameter - prclRect

prclRect (PRECTL) - input Pointer to rectangle in world or screen coordinates.

RECTL structure:

xLeft Minimum x-coordinate of rectangle
yBottom Minimum y-coordinate
xRight Maximum x-coordinate of rectangle
yTop Maximum y-coordinate

The prclRect parameter is a NULL rectangle when the value of xRight is less than xLeft, and yTop is less than yBottom.