GreSetPageViewport

GreSetPageViewport name field sets the page viewport in device coordinates so that the graphics engine can update the device transform by using the page window and page viewport coordinates.

This function can be hooked by the presentation driver.


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

Syntax
GreSetPageViewport(hdc, prclViewport, flOptions, pInstance, lFunction);

Parameters

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


 * prclViewport (PRECTL) - input
 * Pointer to page viewport boundaries in device coordinates.


 * RECTL structure:


 * xLeft Minimum x-coordinate of viewport
 * yBottom Minimum y-coordinate
 * xRight Maximum x-coordinate of viewport
 * yTop Maximum y-coordinate


 * flOptions (ULONG) - input
 * Reserved parameter. The only valid value is 0.


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


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

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_BASE_ERROR
 * PMERR_COORDINATE_OVERFLOW
 * PMERR_DEV_FUNC_NOT_INSTALLED
 * PMERR_HDC_BUSY
 * PMERR_INSUFFICIENT_MEMORY
 * 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_MATRIX_ELEMENT
 * PMERR_INV_PAGE_VIEWPORT
 * PMERR_INV_PATTERN_REF_PT_ATTR
 * PMERR_INV_PICK_APERTURE_POSN
 * PMERR_INV_RECT
 * PMERR_INV_REGION_CONTROL
 * PMERR_INV_SET_VIEWPORT_OPTION
 * PMERR_PATH_LIMIT_EXCEEDED


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

Sample Code

 * 1) define INCL_GRE_XFORMS
 * 2) include 

HDC      hdc;           /*  Device context handle. */ PRECTL   prclViewport;  /*  Pointer to page viewport boundaries in device coordinates. */ ULONG    flOptions;     /*  Reserved parameter. The only valid value is 0. */ PVOID    pInstance;     /*  Pointer to instance data. */ ULONG    lFunction;     /*  High-order WORD=flags; low-order WORD=NGreSetPageViewport. */ BOOL     fSuccess;      /*  Return codes. */

fSuccess = GreSetPageViewport(hdc, prclViewport,            flOptions, pInstance, lFunction); 