These functions deal with the transmission of messages throughout
 MEWEL. Every MEWEL application must have a message processing loop.
 The MSG structure is used in the main message loop. The MSG structure
 is defined as follows:

 typedef struct event
   HWND  hWnd;     /* handle of the window to whom the message should
 be sent to */
   WORD  message;  /* the message */
   WORD  wParam;   /* argument 1 */
   DWORD lParam;   /* argument 2 */
   DWORD time;     /* time which the message was generated */
   POINT pt;       /* position of the mouse */
 } MSG, *LPMSG;

 DispatchMessage
 GetMessage
 MouseSetDblClickTime
 PeekMessage
 PostWinMessage
 PostMessage
 SendWinMessage
 SendMessage