private IntPtr _WndProc(IntPtr hwnd, WM msg, IntPtr wParam, IntPtr lParam)
{
// Don't do this if called within the SystemParameters2 constructor
if (_UpdateTable != null)
{
List <_SystemMetricUpdate> handlers;
if (_UpdateTable.TryGetValue(msg, out handlers))
{
Assert.IsNotNull(handlers);
foreach (var handler in handlers)
{
handler(wParam, lParam);
}
}
}
return(NativeMethodsShell.DefWindowProc(hwnd, msg, wParam, lParam));
}
private static IntPtr _WndProc(IntPtr hwnd, WM msg, IntPtr wParam, IntPtr lParam)
{
IntPtr ret = IntPtr.Zero;
MessageWindow hwndWrapper = null;
if (msg == WM.CREATE)
{
var createStruct = (CREATESTRUCT)Marshal.PtrToStructure(lParam, typeof(CREATESTRUCT));
GCHandle gcHandle = GCHandle.FromIntPtr(createStruct.lpCreateParams);
hwndWrapper = (MessageWindow)gcHandle.Target;
s_windowLookup.Add(hwnd, hwndWrapper);
}
else
{
if (!s_windowLookup.TryGetValue(hwnd, out hwndWrapper))
{
return(NativeMethodsShell.DefWindowProc(hwnd, msg, wParam, lParam));
}
}
Assert.IsNotNull(hwndWrapper);
WndProc callback = hwndWrapper._wndProcCallback;
if (callback != null)
{
ret = callback(hwnd, msg, wParam, lParam);
}
else
{
ret = NativeMethodsShell.DefWindowProc(hwnd, msg, wParam, lParam);
}
if (msg == WM.NCDESTROY)
{
hwndWrapper._Dispose(true, true);
GC.SuppressFinalize(hwndWrapper);
}
return(ret);
}