GreSetDefaultArcParameters

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GreSetDefaultArcParameters sets the arc parameters to the default values.

This function is supported by the graphics engine.

Syntax

GreSetDefaultArcParameters(hdc, pArcParms, pInstance, lFunction);

Parameters

hdc (HDC) - input
Device context handle.
pArcParms (PARCPARAMS) - input
Pointer to the default arc parameters.
Pointer to an ARCPARAMS structure:
lP P coefficient
lQ Q coefficient
lR R coefficient
lS S coefficient
pInstance (PVOID) - input
Pointer to instance data.
lFunction (ULONG) - input
High-order WORD=flags; low-order WORD=NGreSetDefaultArcParameters.

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

Sample Code

#define INCL_GRE_DEVSUPPORT
#include <os2.h>

HDC           hdc;        /*  Device context handle. */
PARCPARAMS    pArcParms;  /*  Pointer to the default arc parameters. */
PVOID         pInstance;  /*  Pointer to instance data. */
ULONG         lFunction;  /*  High-order WORD=flags; low-order WORD=NGreSetDefaultArcParameters. */
BOOL          fSuccess;   /*  Return codes. */

fSuccess = GreSetDefaultArcParameters(hdc,
             pArcParms, pInstance, lFunction);