CE{at}9> CHAR mess2[]="The mouse is inside the window";

*Whenever* you receive a WM_MOUSEMOVE message,  the mouse is over your
window (unless you have called WinSetCapture(),  in which case your window
is the only one that receives mouse messages,  even if the pointer moves
outside your window).

The mouse co-ordinates will be adjusted for your window, so the when the
mouse is over the bottom left of your window,  you will recieve the
coordinates 0, 0.

Here's a sample:

 // compiled: icc /Kb+ /SS /B"/pm:pm" small3.c
 #define INCL_WIN
 #include 
 #include 
 #include 

 #define ID_WINDOW 1

 MRESULT EXPENTRY MyWindowProc(HWND hwnd, ULONG msg, MPARAM mp1, MPARAM mp2)
 {
     static char mesg[100];
     RECTL rect;
     HPS hps;

     switch (msg) {
             case WM_ERASEBACKGROUND:
             return (MRESULT) (TRUE);
         case WM_MOUSEMOVE:
             sprintf(mesg, "%d, %d", SHORT1FROMMP(mp1), SHORT2FROMMP(mp1));
             WinInvalidateRect(hwnd, NULL, FALSE);   /* force draw */
             break;
         case WM_PAINT:
             hps = WinBeginPaint(hwnd, 0, NULL);
             WinQueryWindowRect(hwnd, &rect);
             WinDrawText(hps, strlen(mesg), mesg, &rect, 0, 0,
                 DT_CENTER | DT_VCENTER | DT_TEXTATTRS | DT_ERASERECT);
             WinEndPaint(hps);
             break;
         default:
             return WinDefWindowProc(hwnd, msg, mp1, mp2);
     }
     return 0;
 }

 int main(void)
 {
     HAB hab;
     HMQ hmq;
     HWND hwndClient;
     HWND hwndFrame;
     ULONG flCreate;
     QMSG qmsg;

     if (!(hab = WinInitialize(0)))
         return 1;

     if (!(hmq = WinCreateMsgQueue(hab, 0)))
         return 1;

     if (!WinRegisterClass(hab, (PSZ) "MyWindow", (PFNWP)
MyWindowProc, 0, 0))
         return 1;

     flCreate = FCF_SHELLPOSITION | FCF_SIZEBORDER | FCF_TASKLIST |
         FCF_SYSMENU | FCF_TITLEBAR;


     hwndFrame = WinCreateStdWindow(HWND_DESKTOP, WS_VISIBLE, &flCreate,
         "MyWindow", NULL, 0, 0, ID_WINDOW, &hwndClient);

     if (!hwndFrame || !hwndClient)
         return 1;

     while (WinGetMsg(hab, &qmsg, 0L, 0, 0))
         WinDispatchMsg(hab, &qmsg);

     WinDestroyWindow(hwndFrame);
     WinDestroyMsgQueue(hmq);
     WinTerminate(hab);

     return 0;
 }


--- Maximus/2 2.01