This example calls WinMakeRect to convert a window rectangle (WRECT structure) to a graphics rectangle (RECTL structure).

#define INCL_WINRECTANGLES      /* Window Rectangle Functions   */
#include <os2.h>

HAB     hab;            /* anchor-block handle                  */
BOOL  fSuccess;         /* success indicator                    */
/* window rectangle */
WRECT  pwrcprc = {0,0,0,0,50,0,50,0};

/* convert rectangle */
fSuccess = WinMakeRect(hab, &pwrcprc);