Difference between revisions of "GreSetArcParameters"

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(Created page with "GreSetArcParameters sets the arc parameters. This function can be hooked by the presentation driver. ;Simulation support: This function is simulated by a handling routine i...")
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Revision as of 03:15, 16 January 2020

GreSetArcParameters sets the arc parameters.

This function can be hooked by the presentation driver.

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

Syntax

GreSetArcParameters(hdc, pArcParms, pInstance, lFunction);

Parameters

hdc (HDC) - input
Device context handle.
pArcParms (PARCPARAMS) - input
Pointer to an array containing the arc parameters.
ARCPARAMS structure:
  • lP P coefficient
  • lQ Q coefficient
  • lR R coefficient
  • lS S coefficient
See the Presentation Manager Programming Reference for a full description of the arc parameters structure.
pInstance (PVOID) - input
Pointer to instance data.
lFunction (ULONG) - input
High-order WORD=flags; low-order WORD=NGreSetArcParameters.

Returns

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


Sample

#define INCL_GRE_ARCS
#include <os2.h>

HDC           hdc;        /*  Device context handle. */
PARCPARAMS    pArcParms;  /*  Pointer to an array containing the arc parameters. 

ARCPARAMS structure: */
PVOID         pInstance;  /*  Pointer to instance data. */
ULONG         lFunction;  /*  High-order WORD=flags; low-order WORD=NGreSetArcParameters. */
BOOL          fSuccess;   /*  Return codes. */

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