How can I avoid a window from being resized?

This is a discussion on How can I avoid a window from being resized? within the Windows Programming forums, part of the Platform Specific Boards category; I don't want that the user can change the size of the main window of the application....

  1. #1
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    How can I avoid a window from being resized?

    I don't want that the user can change the size of the main window of the application.

  2. #2
    erstwhile
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  3. #3
    It's full of stars adrianxw's Avatar
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    Create the window without the WS_THICKFRAME style.
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  4. #4
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    I create the main Window using:

    Code:
    hwnd = CreateWindowEx (
               0,                   /* Extended possibilites for variation */
               szClassName,         /* Classname */
               "Windows App",       /* Title Text */
               WS_OVERLAPPEDWINDOW, /* default window */
               CW_USEDEFAULT,       /* Windows decides the position */
               CW_USEDEFAULT,       /* where the window ends up on the screen */
               CW_USEDEFAULT,       /* The programs width */
               CW_USEDEFAULT,       /* and height in pixels */
               HWND_DESKTOP,        /* The window is a child-window to desktop */
               NULL,                /* No menu */
               hThisInstance,       /* Program Instance handler */
               NULL                 /* No Window Creation data */
               );
    If I process the WM_GETMINMAXINFO, what do I have to do so that the window can't be resized by the user?

  5. #5
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    You used WS_OVERLAPPEDWINDOW, that is the problem.
    This is what it does

    WS_OVERLAPPEDWINDOW: Creates an overlapped window with the WS_OVERLAPPED, WS_CAPTION, WS_SYSMENU, WS_THICKFRAME, WS_MINIMIZEBOX, and WS_MAXIMIZEBOX styles. Same as the WS_TILEDWINDOW style.

  6. #6
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    I want a normal window except for the fact that the user can't resize it. What WS_ .. do I have to use instead of WS_OVERLAPPEDWINDOW?

  7. #7
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    //constrains window size to 640x480

    case WM_GETMINMAXINFO:
    {
    LPPOINT lppt;

    lppt = (LPPOINT)lParam; // lParam points to array of POINTS

    lppt[3].x = 640;
    lppt[4].x = 640;
    lppt[3].y = 480;
    lppt[4].y = 480;

    return DefWindowProc(hwnd, msg, wParam, lParam);
    }

  8. #8
    erstwhile
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    Quote Originally Posted by dit6a9
    I want a normal window except for the fact that the user can't resize it. What WS_ .. do I have to use instead of WS_OVERLAPPEDWINDOW?
    WS_OVERLAPPEDWINDOW&~WS_THICKFRAME to create a window with a non-sizing border while retaining the other styles included with WS_OVERLAPPED. WM_GETMINMAXINFO is used to limit the dimensions of a window that can be resized by the user which is what I originally thought you were after.
    Last edited by Ken Fitlike; 08-02-2004 at 10:08 AM.
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  9. #9
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    Many thanks for your answers. I have used
    Code:
    WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX | WS_MAXIMIZEBOX
    (leaving out WS_THICKFRAME) and it works fine.

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