This function returns the message time for the last message retrieved by the WinGetMsg or WinPeekMsg functions from the current message queue.

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

HAB      hab;     /*  Anchor-block handle. */
ULONG    ulTime;  /*  Time in milliseconds. */

ulTime = WinQueryMsgTime(hab);