This example sets the Bidirectional Attributes of the presentation space to the set of attributes in ulBidiAttr. flags bit to zero.
#define INCL_PMBIDI
#include <OS2.H>
#include <PMBIDI.H>
HWND hwnd;
VOID SetBidiAttr(VOID)
{
HPS hps;
ULONG ulBidiAttr = BDA_TEXT_ORIENT_LTR | BDA_TEXTTYPE_VISUAL ;
ULONG fSuccess;
hps = WinGetPS(hwnd);
if (hps)
fSuccess = GpiSetBidiAttr (hps, ulBidiAttr);
WinReleasePS(hps);
}