## Presentation Device Driver Reference for OS/2

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### GreCharStringPos Parameter - prclRect

prclRect (PRECTL) - input Pointer to an opaque or clip rectangle.

The clipping rectangle pointed to by this parameter is defined as a RECTL structure:

xLeft Minimum X-coordinate of rectangle
yBottom Minimum Y-coordinate
xRight Maximum X-coordinate of rectangle
yTop Maximum Y-coordinate

This rectangle, which is in world coordinates, is used as the clipping rectangle or as the background for the string, or both, depending on the value of flOptions. When the CHS_OPAQUE flag is set, normal background mix attributes are ignored and the rectangle is drawn using overpaint and the character background color attribute. When the CHS_OPAQUE is not set, the background is drawn using the normal method. When neither CHS_OPAQUE nor CHS_CLIP are specified, this parameter is ignored. Notice that points on the boundary of this rectangle are considered to be inside the rectangle.