WPF

private static IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
  const WM_QUERYENDSESSION = 0x0011;
  switch (msg)
  {
    case WM_QUERYENDSESSION:
      // The "screen" is fading here - do what you need to do...
      break;
  }
  return IntPtr.Zero;
}

void MyWindow_Loaded(object sender, RoutedEventArgs e)
{
  HwndSource src = HwndSource.FromHwnd(new WindowInteropHelper(this).Handle);
  src.AddHook(new HwndSourceHook(WndProc));
}

public class WpfApplication : Application
{
    private static DispatcherOperationCallback exitFrameCallback = new 
                                        DispatcherOperationCallback(ExitFrame);

    public static void DoEvents()
    {

        DispatcherFrame nestedFrame = new DispatcherFrame();

        DispatcherOperation exitOperation = Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Background, exitFrameCallback, nestedFrame);

        Dispatcher.PushFrame(nestedFrame);

        if (exitOperation.Status != DispatcherOperationStatus.Completed)
        {
            exitOperation.Abort();
        }
    }

    private static Object ExitFrame(Object state)
    {
         DispatcherFrame frame = state as DispatcherFrame;
         frame.Continue = false;
         return null;
    }
}

mildred-frontfree wrote:

Why could not I set the second row to *?

Mark Salsbery
Microsoft MVP - Visual C++

<Button Style="{DynamicResource ButtonStyle1}" Width="100" Height="25" Content="Button" Click="Button_Click"/>

...

        private void Button_Click(object sender, RoutedEventArgs e)
        {
        }

Mark Salsbery
Microsoft MVP - Visual C++

Collin Jasnoch wrote:

I would want to make a click event in the usercontrol that instantiates the custom control

Mark Salsbery
Microsoft MVP - Visual C++

<!-- UserControl1.xaml -->

<UserControl x:Class="<code>MyNamespace.UserControl1</code>"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:MyControlsWPF="clr-namespace:<code>MyControlsWPF</code>"
    Width="100" Height="100" >
    <Grid>
        <code><!-- Here's your instantiation of a custom button! --></code>
        <MyControlsWPF:MyButton x:Name="myCustomButton" Click="myCustomButton_Click" />
    </Grid>
</UserControl>

// UserControl1.xaml.cs

using System;
using System.Windows;
using System.Windows.Controls;

namespace <code>MyNamespace</code>
{
    /// <summary>
    /// Interaction logic for UserControl1.xaml
    /// </summary>
    public partial class <code>UserControl1</code> : UserControl
    {
        public UserControl1()
        {
            InitializeComponent();
        }

        private void myCustomButton_Click(object sender, RoutedEventArgs e)
        {
        }
    }
}

Mark Salsbery
Microsoft MVP - Visual C++