Simulation support:

This function is mandatory for display drivers. For other drivers, it is simulated by a handling routine in the graphics engine.

Description:

GreSetStyleRatio sets the style ratio used by the presentation driver's line-drawing algorithm to determine which pels are turned ON to draw a sloping line.

#define INCL_GRE_DEVMISC2
#include <os2.h>

HDC      hdc;        /*  The device context handle. */
PBYTE    pRatio;
PVOID    pInstance;  /*  A pointer to instance data. */
ULONG    lFunction;  /*  High-order WORD=flags; low-order WORD=NGreSetStyleRatio. */
BOOL     fSuccess;   /*  Return codes. */

fSuccess = GreSetStyleRatio(hdc, pRatio, pInstance,
             lFunction);