## Presentation Device Driver Reference for OS/2

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### GreDeviceSetDCOrigin - Parameters

hdc (HDC) - input Device context handle.

pptlDC (PPOINTL) - input Pointer to the DC origin.

This is the offset to the origin of the device context indicated by hdc. Convert does not add in this offset (see GreConvert). Therefore, the presentation driver must add it to all device coordinates to make them screen coordinates.

Note: WORLD_COORDINATE to SCREEN_COORDINATE is not a valid conversion.

pInstance (PVOID) - input Pointer to instance data.

lFunction (ULONG) - input High-order WORD=flags; low-order WORD= NGreDeviceSetDCOrigin.

rc (BOOL) - returns Return Codes.

On completion, the handling routine must return a BOOLEAN value to indicate success or an error.

TRUE Successful
FALSE Error

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_HDC

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