## Presentation Device Driver Reference for OS/2

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### OS2_PM_DRV_ENABLE: Subfunction 0Eh - QueryDeviceSurface Return Value - rc

rc (LONG) - returns Return codes.

The handling routine should return a LONG integer. Valid values are:

Zero (0) Success
- 1 Error

If pParam1 is a null pointer, return a zero (0) if you are requesting new graphics engine support; otherwise, return a - 1.