private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
switch (msg)
{
case 126:
if (IsVisible)
{
RenderLayeredWindow();
}
break;
case 33:
handled = true;
return(new IntPtr(3));
case 132:
Cursor = GetCursor(lParam) ?? Cursors.None;
break;
case 161:
case 163:
case 164:
case 166:
case 167:
case 169:
case 171:
case 173:
var targetWindowHandle = TargetWindowHandle;
NativeMethods.SendMessage(targetWindowHandle, 6, new IntPtr(2), IntPtr.Zero);
NativeMethods.SendMessage(targetWindowHandle, msg, wParam, IntPtr.Zero);
break;
case 6:
return(IntPtr.Zero);
case 70:
var windowPos = (Windowpos)Marshal.PtrToStructure(lParam, typeof(Windowpos));
windowPos.flags |= 16U;
Marshal.StructureToPtr(windowPos, lParam, true);
break;
case 513:
if (!IsHitTestVisible)
{
break;
}
var pt = new Point((int)lParam & 0xFFFF, ((int)lParam >> 16) & 0xFFFF);
NativeMethods.PostMessage(TargetWindowHandle,
161, (IntPtr)DecideResizeDirection(pt),
IntPtr.Zero);
break;
}
return(NativeMethods.DefWindowProc(hwnd, msg, wParam, lParam));
}
protected static void ShowWindowMenu(HwndSource source, Point screenPoint, bool canMinimize)
{
var systemMetrics = NativeMethods.GetSystemMetrics(40);
var systemMenu = NativeMethods.GetSystemMenu(source.Handle, false);
var windowPlacement = NativeMethods.GetWindowPlacement(source.Handle);
var flag = VisualUtilities.ModifyStyle(source.Handle, 268435456, 0);
var uEnable = canMinimize ? 0U : 1U;
if (windowPlacement.showCmd == 1)
{
NativeMethods.EnableMenuItem(systemMenu, 61728U, 1U);
NativeMethods.EnableMenuItem(systemMenu, 61456U, 0U);
NativeMethods.EnableMenuItem(systemMenu, 61440U, 0U);
NativeMethods.EnableMenuItem(systemMenu, 61488U, 0U);
NativeMethods.EnableMenuItem(systemMenu, 61472U, uEnable);
NativeMethods.EnableMenuItem(systemMenu, 61536U, 0U);
}
else if (windowPlacement.showCmd == 3)
{
NativeMethods.EnableMenuItem(systemMenu, 61728U, 0U);
NativeMethods.EnableMenuItem(systemMenu, 61456U, 1U);
NativeMethods.EnableMenuItem(systemMenu, 61440U, 1U);
NativeMethods.EnableMenuItem(systemMenu, 61488U, 1U);
NativeMethods.EnableMenuItem(systemMenu, 61472U, uEnable);
NativeMethods.EnableMenuItem(systemMenu, 61536U, 0U);
}
if (flag)
{
VisualUtilities.ModifyStyle(source.Handle, 0, 268435456);
}
var fuFlags = (uint)(systemMetrics | 256 | 128 | 2);
var num = NativeMethods.TrackPopupMenuEx(systemMenu, fuFlags, (int)screenPoint.X, (int)screenPoint.Y,
source.Handle, IntPtr.Zero);
if (num == 0)
{
return;
}
NativeMethods.PostMessage(source.Handle, 274, new IntPtr(num), IntPtr.Zero);
}