Description:
OS2_PM_DRV_ENABLE: BeginCloseDC is called to inform the presentation driver that the device context is being closed.
#include <os2.h>
ULONG ulSubfunction; /* 0Bh. */
HDC hdcParam1;
PLONG pParam2; /* A pointer (pInstance) to the DC instance data. */
LONG rc; /* Return codes. */
rc = BeginCloseDC(ulSubfunction, hdcParam1,
pParam2);