This function specifies a text font in the DDF buffer.
#define INCL_DDF
#include <os2.h>
HDDF hddf; /* Handle to DDF returned by DdfInitialize. */
PCSZ pszFaceName; /* Pointer to font name. */
ULONG ulWidth; /* Font width in points. */
ULONG ulHeight; /* Font height in points. */
BOOL rc; /* Success indicator. */
rc = DdfSetFont(hddf, pszFaceName, ulWidth,
ulHeight);