private IntPtr OnWindowMessageInternal(IntPtr hWnd, uint messageId, IntPtr wParam, IntPtr lParam)
{
if (messageId == taskbarWindowMessageId)
{
TaskbarCreated?.Invoke();
}
WindowMessage?.Invoke(messageId, wParam, lParam);
return(NativeMethods.DefWindowProc(hWnd, messageId, wParam, lParam));
}
public WindowMessageSink(Shell32.ENotifyIconVersion version = Shell32.ENotifyIconVersion.Win95)
: this()
{
Version = version;
// Get the message used to indicate the taskbar has been restarted
// This is used to re-add icons when the taskbar restarts
TaskbarRestartMessageID = Win32.RegisterWindowMessage("TaskbarCreated");
// Create a hidden dummy window
var wc = new Win32.WNDCLASS
{
style = 0,
lpfnWndProc = m_message_handler = OnWindowMessageReceived,
cbClsExtra = 0,
cbWndExtra = 0,
hInstance = IntPtr.Zero,
hIcon = IntPtr.Zero,
hCursor = IntPtr.Zero,
hbrBackground = IntPtr.Zero,
lpszMenuName = string.Empty,
lpszClassName = WindowId,
};
IntPtr OnWindowMessageReceived(IntPtr hWnd, int message_id, IntPtr wParam, IntPtr lParam)
{
// Recreate the icon if the taskbar was restarted (e.g. due to Win Explorer shutdown)
if (message_id == TaskbarRestartMessageID)
{
TaskbarCreated?.Invoke(this, EventArgs.Empty);
}
// Forward the message
ProcessWindowMessage(message_id, wParam, lParam);
return(Win32.DefWindowProc(hWnd, message_id, wParam, lParam));
}
Win32.RegisterClass(wc);
// Create the message window
HWnd = Win32.CreateWindow(0, WindowId, "", 0, 0, 0, 1, 1, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero);
if (HWnd == IntPtr.Zero)
{
throw new Win32Exception("Failed to create window for notification icon");
}
}
