How to remove minimize and maximize buttons from a resizable window? - 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# preferred) 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
{
// from winuser.h
private const int GWL_STYLE = -16,
WS_MAXIMIZEBOX = 0x10000,
WS_MINIMIZEBOX = 0x20000;
[DllImport("user32.dll")]
extern private static int GetWindowLong(IntPtr hwnd, int index);
[DllImport("user32.dll")]
extern private static int SetWindowLong(IntPtr hwnd, int index, int value);
internal static void HideMinimizeAndMaximizeButtons(this Window window)
{
IntPtr hwnd = new System.Windows.Interop.WindowInteropHelper(window).Handle;
var currentStyle = GetWindowLong(hwnd, GWL_STYLE);
SetWindowLong(hwnd, GWL_STYLE, (currentStyle & ~WS_MAXIMIZEBOX & ~WS_MINIMIZEBOX));
}
}
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();
};

Answer 2

One way is to set your ResizeMode="NoResize". It will behave like this.

Answer 3

Don't know if this works for your req. visually.. This is
<Window x:Class="DataBinding.MyWindow" ...Title="MyWindow" Height="300" Width="300"
WindowStyle="ToolWindow" ResizeMode="CanResizeWithGrip">

Answer 4

If anyone use Devexpress window (DXWindow) accepted answer doesn't work. One ugly approach is
public partial class MyAwesomeWindow : DXWindow
{
public MyAwesomeWIndow()
{
Loaded += OnLoaded;
}
private void OnLoaded(object sender, RoutedEventArgs routedEventArgs)
{
// hides maximize button
Button button = (Button)DevExpress.Xpf.Core.Native.LayoutHelper.FindElementByName(this, DXWindow.ButtonParts.PART_Maximize.ToString());
button.IsHitTestVisible = false;
button.Opacity = 0;
// hides minimize button
button = (Button)DevExpress.Xpf.Core.Native.LayoutHelper.FindElementByName(this, DXWindow.ButtonParts.PART_Minimize.ToString());
button.IsHitTestVisible = false;
button.Opacity = 0;
// hides close button
button = (Button)DevExpress.Xpf.Core.Native.LayoutHelper.FindElementByName(this, DXWindow.ButtonParts.PART_CloseButton.ToString());
button.IsHitTestVisible = false;
button.Opacity = 0;
}
}

Answer 5

Here's a solution I'm using. Note that maximize button is still displayed.
Markup:
<Window x:Class="Example"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Example"
StateChanged="Window_StateChanged">
Code behind:
// Disable maximizing this window
private void Window_StateChanged(object sender, EventArgs e)
{
if (this.WindowState == WindowState.Maximized)
this.WindowState = WindowState.Normal;
}

Answer 6

This variant of the solution proposed by #MattHamilton can (and must) be called in the constructor of the Window. The trick is to subscribe a delegate to the SourceInitialized event within the extension method.
private const int GWL_STYLE = -16, WS_MAXIMIZEBOX = 0x10000, WS_MINIMIZEBOX = 0x20000;
[DllImport("user32.dll")]
extern private static int GetWindowLong(IntPtr hwnd, int index);
[DllImport("user32.dll")]
extern private static int SetWindowLong(IntPtr hwnd, int index, int value);
/// <summary>
/// Hides the Minimize and Maximize buttons in a Window. Must be called in the constructor.
/// </summary>
/// <param name="window">The Window whose Minimize/Maximize buttons will be hidden.</param>
public static void HideMinimizeAndMaximizeButtons(this Window window)
{
window.SourceInitialized += (s, e) => {
IntPtr hwnd = new System.Windows.Interop.WindowInteropHelper(window).Handle;
int currentStyle = GetWindowLong(hwnd, GWL_STYLE);
SetWindowLong(hwnd, GWL_STYLE, currentStyle & ~WS_MAXIMIZEBOX & ~WS_MINIMIZEBOX);
};
}

Answer 7

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

Answer 8

Just use
WindowStyle="ToolWindow"
It hides the maximize and minimize buttons, but the window can still be resized by dragging the window borders and minimize using the hide button in the bottom right corner of the taskbar.
https://learn.microsoft.com/en-us/dotnet/api/system.windows.window.windowstyle?view=windowsdesktop-6.0