Simulation support:

This function is mandatory for display drivers that want to be DCAF-enabled.

Description GreCloseScreenChangeArea frees the data area internal to the display driver, identified by the SCA handle, that was accumulating screen changes.

#define INCL_GRE_SCREEN
#include <os2.h>
#include <pmddi.h>

HDC      hdc;     /*  Any valid device context. */
HSCA     hsca;    /*  Handle of the SCA to be closed. */
PDC      pdcArg;  /*  Pointer to instance data. */
ULONG    FunN;    /*  High-order word=Flags; Low-order word=NGreCloseScreenChangeArea. */
BOOL     rc;

rc = GreCloseScreenChangeArea(hdc, hsca, pdcArg,
       FunN);