How do I remove minimize and maximize from a resizable window in WPF?

Question

WPF doesn't provide the ability to have a window that allows resize but doesn't have maximize or minimize buttons. I'd like to able to make such a window so I can have resizable dialog boxes.

I'm aware the solution will mean using pinvoke but I'm not sure what to call and how. A search of pinvoke.net didn't turn up any thing that jumped out at me as what I needed, mainly I'm sure because Windows Forms does provide the CanMinimize and CanMaximize properties on its Windows.

Could someone point me towards or provide code (C# prefered) on how to do this?

Answer 1

I've stolen some code I found on the MSDN forums and made an extension method on the Window class, like this:

internal static class WindowExtensions
{
    [DllImport("user32.dll")]
    internal extern static int SetWindowLong(IntPtr hwnd, int index, int value);

    [DllImport("user32.dll")]
    internal extern static int GetWindowLong(IntPtr hwnd, int index);

    internal static void HideMinimizeAndMaximizeButtons(this Window window)
    {
        const int GWL_STYLE = -16;

        IntPtr hwnd = new System.Windows.Interop.WindowInteropHelper(window).Handle;
        long value = GetWindowLong(hwnd, GWL_STYLE);

        SetWindowLong(hwnd, GWL_STYLE, (int)(value & -131073 & -65537));

    }
}

The only other thing to remember is that for some reason this doesn't work from a window's constructor. I got around that by chucking this into the constructor:

this.SourceInitialized += (x, y) =>
{
    this.HideMinimizeAndMaximizeButtons();
};

Hope this helps!

Answer 2

Code given above dint work for me. No change in the window display.....

Answer 3

You can set the ResizeMode="NoResize" of the window if you want to remove Minimize and Maximize button