This function sets the background and foreground colors of the displayed text.

#define INCL_DDF
#include <os2.h>

HDDF     hddf;        /*  Handle to DDF returned by DdfInitialize. */
COLOR    fBackColor;  /*  Specifies the desired background color. */
COLOR    fForColor;   /*  Specifies the desired foreground color. */
BOOL     rc;          /*  Success indicator. */

rc = DdfSetColor(hddf, fBackColor, fForColor);