## Presentation Device Driver Reference for OS/2

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### GreQueryNearestColor Return Value - rc

rc (LONG) - returns Return Code.

The handling routine must return the nearest available RGB color to that requested (rgbColorOut), or GPI_ALTERROR if an error occurred.

Possible Errors Detected: When an error is detected, the handling routine must call WinSetErrorInfo to post the condition. Error codes for conditions that the handling routine is expected to check include:

PMERR_DEV_FUNC_NOT_INSTALLED
PMERR_INV_COLOR_OPTIONS
PMERR_INV_HDC
PMERR_INV_RGBCOLOR

Refer to the "Error Explanations" section in the Presentation Manager Programming Reference for further explanation.