static extern bool GetWindowRect(System.IntPtr hWnd, out RECT lpRect);

        GetWindowRect(hWnd, out to);

    bool GetWindowRect(int hWnd, RECT^ lpRect);

        GetWindowRect(hWnd, to);

Use GetWindowRect Win32 method for position information.

static extern bool GetWindowRect(IntPtr hwnd, out RECT lpRect);

Private Shared Function GetWindowRect(ByVal hWnd As HandleRef, ByRef lpRect As RECT) As Boolean

static extern bool GetWindowRect(HandleRef hWnd, out RECT lpRect);

     if(!GetWindowRect(new HandleRef(this, this.Handle), out rct ))

GetWindowRect(hWnd, out rct);

    internal static extern bool GetWindowRect(IntPtr hWnd, ref RECT rect);

        GetWindowRect(id, ref Rect);

GetWindowRect(hWnd, out rct);

        var windowRec = GetWindowRect(windowHandler);