internal void TestDrop(IDockDragSource dragSource, DockOutlineBase dockOutline)
{
if (VisibleNestedPanes.Count == 1)
{
DockPane pane = VisibleNestedPanes[0];
if (!dragSource.CanDockTo(pane))
{
return;
}
Point ptMouse = Control.MousePosition;
uint lParam = Win32Helper.MakeLong(ptMouse.X, ptMouse.Y);
if (!Win32Helper.IsRunningOnMono)
{
if (NativeMethods.SendMessage(Handle, (int)Win32.Msgs.WM_NCHITTEST, 0, lParam) == (uint)Win32.HitTest.HTCAPTION)
{
dockOutline.Show(VisibleNestedPanes[0], -1);
}
}
}
}