GreResetDC

GreResetDC restores a device context to its created state.

This function is supported by the graphics engine.

Syntax
GreResetDC(hdc, flOptions, pInstance, lFunction);

Parameters

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


 * flOptions (ULONG) - input
 * Option flags.


 * Valid flags are:


 * RDC_SETOWNERTOSHELL
 * When set, the graphics engine sets the ownership of the reset DC to the process that first initialized the engine, (normally the Presentation Manager interface).


 * RDC_RGBMODE
 * Sets the DC's logical color table to RGB mode.


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


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

Return Code

 * fSuccess (BOOL) - returns
 * Return codes.


 * On completion, the handling routine must return BOOLEAN (fSuccess).


 * TRUE Successful
 * FALSE Error


 * Possible Errors Detected:  When an error is detected, the graphics engine calls WinSetErrorInfo to post the condition. Reasons for failure of this function include:


 * PMERR_BASE_ERROR
 * PMERR_BITMAP_IS_SELECTED
 * PMERR_DEV_FUNC_NOT_INSTALLED
 * PMERR_EXCEEDS_MAX_SEG_LENGTH
 * PMERR_HBITMAP_BUSY
 * PMERR_HDC_BUSY
 * PMERR_INSUFFICIENT_MEMORY
 * PMERR_INV_BITMAP_DIMENSION
 * PMERR_INV_CODEPAGE
 * PMERR_INV_COORDINATE
 * PMERR_INV_DC_TYPE
 * PMERR_INV_HBITMAP
 * PMERR_INV_HDC
 * PMERR_INV_HRGN
 * PMERR_INV_ID
 * PMERR_INV_IN_AREA
 * PMERR_INV_IN_PATH
 * PMERR_INV_INFO_TABLE
 * PMERR_INV_LENGTH_OR_COUNT
 * PMERR_INV_RECT
 * PMERR_INV_REGION_CONTROL
 * PMERR_INV_SCAN_START


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

Remarks
All objects, such as fonts, patterns, and paths, are deleted. All attributes are set to their defaults. Any clip region selected into the DC is deleted.

This function does not alter Window Manager information stored in the DC instance data. Window Manager information includes:
 * The visible region
 * The DC origin
 * User bounds
 * Cached clipping rectangles
 * The HDC_IS_DIRTY flag

Sample Code



 * 1) define INCL_GRE_DCS
 * 2) include 

HDC     hdc;        /*  Device context handle. */ ULONG   flOptions;  /*  Option flags. */ PVOID   pInstance;  /*  Pointer to instance data. */ ULONG   lFunction;  /*  High-order WORD=flags; low-order WORD=NGreResetDC. */ BOOL    fSuccess;   /*  Return codes. */

fSuccess = GreResetDC(hdc, flOptions, pInstance,            lFunction); 