private static extern bool GetMonitorInfo(IntPtr hMonitor, ref MONITORINFO lpmi);
public static void GetMinMaxInfo(Window window, IntPtr hwnd, IntPtr lParam)
{
var mmi = (MINMAXINFO)Marshal.PtrToStructure(lParam, typeof(MINMAXINFO));
var hMonitor = MonitorFromWindow(hwnd, 0x02);
if (hMonitor != IntPtr.Zero)
{
var mi = new MONITORINFO();
mi.cbSize = Marshal.SizeOf(typeof(MONITORINFO));
GetMonitorInfo(hMonitor, ref mi);
RECT rcWorkArea = mi.rcWork;
RECT rcMonitorArea = mi.rcMonitor;
mmi.ptMaxPosition.X = Math.Abs(rcWorkArea.Left - rcMonitorArea.Left);
mmi.ptMaxPosition.Y = Math.Abs(rcWorkArea.Top - rcMonitorArea.Top);
mmi.ptMaxSize.X = Math.Abs(rcWorkArea.Right - rcWorkArea.Left);
mmi.ptMaxSize.Y = Math.Abs(rcWorkArea.Bottom - rcWorkArea.Top);
mmi.ptMinTrackSize.X = (int)window.MinWidth;
mmi.ptMinTrackSize.Y = (int)window.MinHeight;
}
Marshal.StructureToPtr(mmi, lParam, true);
}