Disableing the "resize" function on a window

This is a discussion on Disableing the "resize" function on a window within the Windows Programming forums, part of the Platform Specific Boards category; How do you disable resize on a window? Thanks, August....

  1. #1
    Registered User Queatrix's Avatar
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    Disableing the "resize" function on a window

    How do you disable resize on a window?
    Thanks, August.

  2. #2
    Yes, my avatar is stolen anonytmouse's Avatar
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    Don't use the WS_THICKFRAME style. For example, if you want a normal window without a sizing border you would use:
    Code:
    WS_OVERLAPPEDWINDOW & ~WS_THICKFRAME

  3. #3
    Chief Code Coloniser!
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    Also, if you want to prevent maximize but still want to have the minimize and close boxes you can:

    1) Get a handle to the windows system menu
    2) Use this handle to get another handle to the menu item for the maximise box (SC_MAXIMIZE)
    3) Disable the menu item.

    Cheers.

  4. #4
    Work in Progress..... Jaken Veina's Avatar
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    If you want to get into styling windows like this, you might do better to go to MSND and look up the window styles. Shoudn't be hard to find what you're looking for.

  5. #5
    Registered User Queatrix's Avatar
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    I wouldn't mind disableing the "Maximaze", "Minimize" and the "Close" buttons altogether.

  6. #6
    It's full of stars adrianxw's Avatar
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    >>> and the "Close" buttons

    Handle the WM_CLOSE message.
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  7. #7
    Registered User Queatrix's Avatar
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    Could someone give me an example of this?
    (I am new to WIN32-C++, I guess I should have said that from the start.)
    I tried several different things but the compiler keeps coming back with errors.

  8. #8
    Registered User Queatrix's Avatar
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    I replaced my "WS_THICKFRAME" with "WS_BORDER" but it's not working!!!

  9. #9
    Tropical Coder Darryl's Avatar
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    The best way to disable resizing on any window, no matter what style is to handle the WM_GETMINMAXINFO message.
    Last edited by Darryl; 04-20-2005 at 09:03 AM.

  10. #10
    Registered User Queatrix's Avatar
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    It's still not changing anything.
    Could it have to do with that I am using Dev-C++?

  11. #11
    Tropical Coder Darryl's Avatar
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    What size do you want the window to be? Please be specific, Width and height?

  12. #12
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    Why not handle the WM_SIZE message to just automatically resize the window to whatever size you start with?

  13. #13
    erstwhile
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    Taking anonytmouse's original suggestion here's an example (use &~ to remove a style, so if you don't want a maximize button then deal with the WS_MAXIMIZEBOX style bit accordingly)
    Code:
    #include <windows.h>
    #include <tchar.h>
    
    LRESULT CALLBACK WndProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam);
    
    int WINAPI WinMain(HINSTANCE hInst,HINSTANCE hPrev,LPSTR pStr,int nCmd)
    {
    HWND       hwnd;
    MSG        msg;
    TCHAR      classname[]=_T("kenf's_wnd");
    WNDCLASSEX wcx={0};
    
    wcx.cbSize       =sizeof(wcx); 
    wcx.lpfnWndProc  =WndProc; 
    wcx.hInstance    =hInst; 
    wcx.hIcon        =(HICON)LoadImage(0,IDI_APPLICATION,IMAGE_ICON,0,0, LR_SHARED); 
    wcx.hCursor      =(HCURSOR)LoadImage(0,IDC_ARROW,IMAGE_CURSOR,0,0, LR_SHARED);
    wcx.hbrBackground=(HBRUSH)(COLOR_BTNFACE+1); 
    wcx.lpszClassName=classname; 
    
    if (RegisterClassEx(&wcx))
      {
      hwnd=CreateWindowEx(0,classname,_T("Title"),
                          WS_OVERLAPPEDWINDOW&~WS_THICKFRAME, 
                          GetSystemMetrics(SM_CXSCREEN)/4,
                          GetSystemMetrics(SM_CYSCREEN)/4,
                          GetSystemMetrics(SM_CXSCREEN)/2,
                          GetSystemMetrics(SM_CYSCREEN)/2,
                          0,0,hInst,0);
      if (hwnd)
        {
        ShowWindow(hwnd,nCmd);
        UpdateWindow(hwnd);
        
        while (GetMessage(&msg,0,0,0)>0)
          {
          TranslateMessage(&msg);
          DispatchMessage(&msg);
          }
        return msg.wParam;
        }
      else
        {
        MessageBox(0,_T("Wnd creation failure"),_T("Error"),MB_OK|MB_ICONERROR);
        return 0;
        }
      }
    MessageBox(0,_T("Wnd registration failure"),_T("Error"),MB_OK|MB_ICONERROR);
    return 0;
    }
    
    LRESULT CALLBACK WndProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
    {
    switch (uMsg)
      {
      case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
      default:
        return DefWindowProc(hwnd,uMsg,wParam,lParam);
      }
    }
    If you want to permit resizing a window but limit the extent to which a user can do so then handle WM_GETMINMAXINFO messages as Darryl suggested earlier.
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  14. #14
    Registered User Queatrix's Avatar
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    Okay, that works, but how do you disable the MAXIMIZE function? I may not beable to resize, but I can Maximize.

  15. #15
    erstwhile
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    but how do you disable the MAXIMIZE function?
    Quote Originally Posted by Ken Fitlike
    use &~ to remove a style, so if you don't want a maximize button then deal with the WS_MAXIMIZEBOX style bit accordingly
    Explicitly:
    Code:
    WS_OVERLAPPEDWINDOW&~WS_THICKFRAME&~WS_MAXIMIZEBOX
    '&~' just means 'AND-NOT' ie WS_OVERLAPPEDWINDOW is the same as
    Code:
    WS_OVERLAPPED|WS_CAPTION|WS_SYSMENU|WS_THICKFRAME|WS_MINIMIZEBOX|WS_MAXIMIZEBOX
    therefore WS_OVERLAPPEDWINDOW&~WS_THICKFRAME means, literally, use WS_OVERLAPPEDWINDOW without WS_THICKFRAME ie.
    Code:
    WS_OVERLAPPED|WS_CAPTION|WS_SYSMENU|WS_MINIMIZEBOX|WS_MAXIMIZEBOX
    and WS_OVERLAPPEDWINDOW&~WS_THICKFRAME&~WS_MAXIMIZEBOX is WS_OVERLAPPEDWINDOW without WS_THICKFRAME and without WS_MAXIMIZEBOX:
    Code:
    WS_OVERLAPPED|WS_CAPTION|WS_SYSMENU|WS_MINIMIZEBOX
    Or just explicitly specify those window styles you actually want your window to have.
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