This function determines whether a particular format of data is present in the clipboard, and if so, provides information about that format.

#define INCL_WINCLIPBOARD /* Or use INCL_WIN, INCL_PM, */
#include <os2.h>

HAB       hab;          /*  Anchor-block handle. */
ULONG     fmt;          /*  Format of the data to be queried. */
PULONG    prgfFmtInfo;  /*  Memory model and usage flags. */
BOOL      rc;           /*  Format-exists indicator. */

rc = WinQueryClipbrdFmtInfo(hab, fmt, prgfFmtInfo);