DevOpenDC - Example Code

This example calls DevOpenDC to create a memory device context with screen compatibility and then associates that context with a newly created presentation space.

#define INCL_DEV                /* Device Function definitions  */
#define INCL_GPICONTROL         /* GPI control Functions        */
#include <os2.h>

HDC   hdc;              /* Device-context handle                */
HAB   hab;              /* Anchor-block handle                  */
 /* context data structure */
DEVOPENSTRUC dop = {NULL, "DISPLAY", NULL, NULL, NULL, NULL,
                    NULL, NULL, NULL};
HPS    hps;             /* presentation-space handle            */
SIZEL  sizl={0, 0};     /* use same page size as device        */

/* create memory device context */
hdc = DevOpenDC(hab, OD_MEMORY, "*", 5L, (PDEVOPENDATA)&dop, NULLHANDLE);

/* create a presentation space associated with the context */
hps = GpiCreatePS(hab, hdc, &sizl, GPIA_ASSOC | PU_PELS);