GreCloseFigure

GreCloseFigure closes a figure within a path definition by drawing a line from the current (X,Y) position to the start point of the figure. Upon completion, the current position is the start point of the figure. "Open figures" can be generated by starting a new figure (with a Move function) or by ending the path without first closing the figure. GreCloseFigure is valid outside of a path definition. When this occurs, this function has no effect and the handling routine ignores it. For more information, see "GpiCloseFigure" in the Presentation Manager Programming Reference.

This function can be hooked by the presentation driver.

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

Syntax

GreCloseFigure(hdc, pInstance, lFunction);

Parameters

hdc (HDC) - input: Device context handle.

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

lFunction (ULONG) - input: High-order WORD=flags; low-order WORD=NGreCloseFigure.

Return Code

rc (BOOL) - returns: 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_INV_COORD_SPACE
PMERR_INV_HDC
PMERR_INV_LENGTH_OR_COUNT
PMERR_NOT_IN_PATH
PMERR_PATH_LIMIT_EXCEEDED

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

Sample Code

#define INCL_GRE_PATHS
#include <os2.h>

HDC      hdc;        /*  Device context handle. */
PVOID    pInstance;  /*  Pointer to instance data. */
ULONG    lFunction;  /*  High-order WORD=flags; low-order WORD=NGreCloseFigure. */
BOOL     rc;         /*  This function returns BOOLEAN (fSuccess). */

rc = GreCloseFigure(hdc, pInstance, lFunction);