static extern bool GetClientRect(IntPtr hWnd, out RECT lpRect);
/// <summary> /// Get the size of the window /// </summary> /// <param name="windowHandle">Window handle of the target window</param> /// <returns>RECT of the top, left, bottom, and right of the window</returns> public static RECT GetWindowSize(IntPtr windowHandle) { if (windowHandle == IntPtr.Zero) return new RECT(); // Get the Top Left, and Bottom Right coords of the window client area RECT result = new RECT(); GetClientRect(windowHandle, out result); return result; }