/// <summary>
/// Set the window as foreground window
/// </summary>
/// <param name="interopWindow">The window to bring to the foreground</param>
/// <param name="workaround">bool with true to use a trick (press Alt) to really bring the window to the foreground</param>
public static async ValueTask ToForegroundAsync(this IInteropWindow interopWindow, bool workaround = true)
{
// Nothing we can do if it's not visible!
if (!interopWindow.IsVisible())
{
return;
}
// Window is already the foreground window
if (User32Api.GetForegroundWindow() == interopWindow.Handle)
{
return;
}
if (interopWindow.IsMinimized())
{
interopWindow.Restore();
while (interopWindow.IsMinimized())
{
await Task.Delay(50).ConfigureAwait(false);
}
}
// See https://msdn.microsoft.com/en-us/library/windows/desktop/ms633539(v=vs.85).aspx
if (workaround)
{
// Simulate an "ALT" key press, make it double to remove menu activation
KeyboardInputGenerator.KeyPresses(VirtualKeyCode.Menu, VirtualKeyCode.Menu);
}
// Show window in foreground.
User32Api.BringWindowToTop(interopWindow.Handle);
User32Api.SetForegroundWindow(interopWindow.Handle);
}
/// <summary>
/// Create the thumbnail if the form is shown
/// </summary>
/// <param name="e">EventArgs</param>
protected override void OnShown(EventArgs e)
{
base.OnShown(e);
if (_phThumbnail == IntPtr.Zero)
{
var result = Dwm.DwmRegisterThumbnail(Handle, _hWnd, out _phThumbnail);
if (result.Failed())
{
Close();
return;
}
UpdateThumbnail();
}
User32Api.BringWindowToTop(Handle);
}
/// <summary>
/// Set the window as foreground window
/// </summary>
/// <param name="interopWindow">The window to bring to the foreground</param>
public static async ValueTask ToForegroundAsync(this IInteropWindow interopWindow)
{
// Nothing we can do if it's not visible!
if (!interopWindow.IsVisible())
{
return;
}
var foregroundWindow = User32Api.GetForegroundWindow();
// Window is already the foreground window
if (foregroundWindow == interopWindow.Handle)
{
return;
}
if (interopWindow.IsMinimized())
{
interopWindow.Restore();
while (interopWindow.IsMinimized())
{
await Task.Delay(50).ConfigureAwait(false);
}
}
// See https://msdn.microsoft.com/en-us/library/windows/desktop/ms633539(v=vs.85).aspx
// It was advised to use the menu (ALT) key, but this was a solution which Jan Karger showed me
var threadId1 = User32Api.GetWindowThreadProcessId(foregroundWindow, IntPtr.Zero);
var threadId2 = User32Api.GetWindowThreadProcessId(interopWindow.Handle, IntPtr.Zero);
// Show window in foreground.
if (threadId1 != threadId2)
{
User32Api.AttachThreadInput(threadId1, threadId2, 1);
User32Api.SetForegroundWindow(interopWindow.Handle);
User32Api.AttachThreadInput(threadId1, threadId2, 0);
}
else
{
User32Api.SetForegroundWindow(interopWindow.Handle);
}
// Show window in foreground.
User32Api.BringWindowToTop(interopWindow.Handle);
User32Api.SetForegroundWindow(interopWindow.Handle);
}