private void PerformNCCalc(Hwnd hwnd) {
XplatUIWin32.NCCALCSIZE_PARAMS ncp;
IntPtr ptr;
Rectangle rect;
rect = new Rectangle (0, 0, hwnd.Width, hwnd.Height);
ncp = new XplatUIWin32.NCCALCSIZE_PARAMS();
ptr = Marshal.AllocHGlobal(Marshal.SizeOf(ncp));
ncp.rgrc1.left = rect.Left;
ncp.rgrc1.top = rect.Top;
ncp.rgrc1.right = rect.Right;
ncp.rgrc1.bottom = rect.Bottom;
Marshal.StructureToPtr(ncp, ptr, true);
NativeWindow.WndProc(hwnd.client_window, Msg.WM_NCCALCSIZE, (IntPtr)1, ptr);
ncp = (XplatUIWin32.NCCALCSIZE_PARAMS)Marshal.PtrToStructure(ptr, typeof(XplatUIWin32.NCCALCSIZE_PARAMS));
Marshal.FreeHGlobal(ptr);
rect = new Rectangle(ncp.rgrc1.left, ncp.rgrc1.top, ncp.rgrc1.right - ncp.rgrc1.left, ncp.rgrc1.bottom - ncp.rgrc1.top);
hwnd.ClientRect = rect;
rect = TranslateClientRectangleToXClientRectangle (hwnd);
if (hwnd.visible) {
MoveResizeWindow (DisplayHandle, hwnd.client_window, rect.X, rect.Y, rect.Width, rect.Height);
}
AddExpose (hwnd, hwnd.WholeWindow == hwnd.ClientWindow, 0, 0, hwnd.Width, hwnd.Height);
}
#endregion // Private Methods
