This function destroys the specified instance of the Help Manager.

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

HWND    hwndHelpInstance;  /*  Handle of the instance of the Help Manager to be destroyed. */
BOOL    rc;                /*  Success indicator. */

rc = WinDestroyHelpInstance(hwndHelpInstance);