This example determines the intersection of two rectangles and places the result in a third rectangle structure.

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

BOOL   fSuccess;         /* success indicator                    */
HAB      hab;            /* anchor-block handle                  */
PRECTL prclRect1 = {0,0,100,100}; /* rectangle  1                */
PRECTL prclRect2 = {0,0,200,200}; /* rectangle  2                */
PRECTL prclDest;         /* destination rectangle                */

fSuccess = WinIntersectRect(hab, &prclDest, &prclRect1,
                            &prclRect2);