## Presentation Device Driver Reference for OS/2

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### GreOffsetClipRegion - Parameters

hdc (HDC) - input Device context handle.

pdpt (PPOINTL) - input Pointer to offset.

Pointer to offset by which the clipping region is to be moved, in world coordinates:

dx X offset
dy Y offset

pInstance (PVOID) - input Pointer to instance data.

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

rc (LONG) - returns Return codes.

This function returns an integer (lComplexity) indicating the complexity of the region:

RGN_ERROR Error
RGN_NULL Null region
RGN_RECT Rectangular region
RGN_COMPLEX Complex region (more than 1 rectangle)

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_COORDINATE_OVERFLOW
PMERR_DEV_FUNC_NOT_INSTALLED
PMERR_HDC_BUSY
PMERR_INSUFFICIENT_MEMORY
PMERR_INV_COORD_OFFSET
PMERR_INV_COORD_SPACE
PMERR_INV_COORDINATE
PMERR_INV_HDC
PMERR_INV_HRGN
PMERR_INV_IN_AREA
PMERR_INV_IN_PATH
PMERR_INV_LENGTH_OR_COUNT
PMERR_INV_RECT
PMERR_INV_REGION_CONTROL

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