This function specifies a text font style in the DDF buffer.

#define INCL_DDF
#include <os2.h>

HDDF     hddf;        /*  Handle to DDF returned by DdfInitialize. */
ULONG    fFontStyle;  /*  Font style flag. */
BOOL     rc;          /*  Success indicator. */

rc = DdfSetFontStyle(hddf, fFontStyle);