This example enumerates and counts the available clipboard data formats for the clipboard opened by WinOpenClipbrd.

#define INCL_WINCLIPBOARD       /* Window Clipboard Functions   */
#include <os2.h>

BOOL  fSuccess;         /* success indicator                    */
HAB   hab;              /* anchor-block handle                  */
ULONG   ulNext;         /* next format index                    */
ULONG   ulPrev;         /* previous format index                */
ULONG   ulNumFormats=0; /* number of available formats          */


fSuccess = WinOpenClipbrd(hab);

if (fSuccess)
   {
   ulPrev = 0;
   /* enumerate formats and maintain count */
   while ((ulNext = WinEnumClipbrdFmts(hab, ulPrev)) != 0)
      {
      ulNumFormats++;
      ulPrev = ulNext;
      }
   }