syswindow_move() doesn't move?

    Apr 22 2006 | 12:19 pm
    This seems to be my week for obscure problems.
    Following code snippet, simplified (and making some braindead assumptions about Mac OS desktop geometry, but that's not the problem):
    /////////////////// BitMap screenBits; Rect screenRect, windRect, visWindRect;
    GetQDGlobalsScreenBits(&screenBits); screenRect = screenBits.bounds;
    // myWind has already been initialized to a valid t_wind struct windRect.left = myWind->w_x1; windRect.right = myWind->w_x2; = myWind->w_y1; windRect.bottom = myWind->w_y2;
    SectRect(&screenRect, &windRect, &visWindRect); // Really should iterate through the device list, but the // above is good enough for testing... if (EmptyRect(&visWindRect)) { syswindow_move(wind_syswind(myWind), 20, 20, true); } ///////////////////
    The window is not moved after the call to syswindow_move().
    For instance, inserting strategic post()s, as follows
    /////////////////// post("screenRect (%ld, %ld) (%ld, %ld)", (long) screenRect.left, (long), (long) screenRect.right, (long) screenRect.bottom); post("windRect (%ld, %ld) (%ld, %ld)", (long) windRect.left, (long), (long) windRect.right, (long) windRect.bottom);
    SectRect(&screenRect, &windRect, &visWindRect);
    post("visible area (%ld, %ld) (%ld, %ld)", (long) visWindRect.left, (long), (long) visWindRect.right, (long) visWindRect.bottom);
    if (EmptyRect(&visWindRect)) { post("about to move window");
    syswindow_move(wind_syswind(myWind), 20, 20, true);
    post(" top left: %ld %ld", myWind->w_x1, myWind->w_y1); } ///////////////////
    Can yield the following in the Max window:
    screenRect (0, 0) (1440, 900) windRect (-2032, 850) (-1593, 1170) visible area (0, 0) (0, 0) about to move window top left: -2032 850
    Expected result: last line should read " top left: 20 20". And the window should be visible on the main screen.
    This is on Mac OS 10.4.6, Max/MSP 4.5.6. IDE: CW 8.3.
    If I'm not doing something blindingly obviously stupid, I can strip the code down to a minimal object and make it available.
    How does thispatcher do this?
    Greetings, Peter