GreOffsetRegion

GreOffsetRegion moves the given region by the specified amounts (unless the region is in use as a clipping region when an error is raised).

This function can be hooked by the presentation driver.


 * Simulation support: This function is simulated by a handling routine in the graphics engine.

Syntax
GreOffsetRegion(hdc, hrgn, pdpt, pInstance, lFunction);

Parameters

 * hdc (HDC) - input
 * Device context handle.


 * hrgn (HRGN) - input
 * Region handle.


 * pdpt (PPOINTL) - input
 * Pointer to offset by which region is to be moved, in device coordinates:


 * dx X offset
 * dy Y offset


 * pInstance (PVOID) - input
 * Pointer to instance data.


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

Return Code

 * fSuccess (BOOL) - returns
 * Return codes.


 * This function returns BOOLEAN (fSuccess).


 * 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_COORDINATE_OVERFLOW
 * PMERR_HRGN_BUSY
 * PMERR_INV_COORDINATE
 * PMERR_INV_HRGN
 * PMERR_REGION_IS_CLIP_REGION

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

Sample Code

 * 1) define INCL_GRE_REGIONS
 * 2) include 

HDC       hdc;        /*  Device context handle. */ HRGN      hrgn;       /*  Region handle. */ PPOINTL   pdpt;       /*  Pointer to offset by which region is to be moved, in device coordinates: */ PVOID     pInstance;  /*  Pointer to instance data. */ ULONG     lFunction;  /*  High-order WORD=flags; low-order WORD=NGreOffsetRegion. */ BOOL      fSuccess;   /*  Return codes. */

fSuccess = GreOffsetRegion(hdc, hrgn, pdpt, pInstance, lFunction); 