This function is called to invoke a lazy drop operation.
#define INCL_WINSTDDRAG
#include <os2.h>
HWND hwndTarget; /* Handle of the target window receiving the drop. */
ULONG ulOperation; /* Drop operation code. */
PPOINTL pptlDrop; /* Pointer to the drop location in desktop coordinates. */
BOOL rc; /* Success indicator. */
rc = DrgLazyDrop(hwndTarget, ulOperation,
pptlDrop);