private static void WmGetMinMaxInfo(IntPtr hWnd, IntPtr lParam)
{
var mmi = (MINMAXINFO)Marshal.PtrToStructure(lParam, typeof(MINMAXINFO));
IntPtr pMonitor = MonitorFromWindow(hWnd, MONITOR_DEFAULTTONEAREST);
if (pMonitor != IntPtr.Zero)
{
var mi = new MONITORINFO();
GetMonitorInfo(pMonitor, mi);
RECT rcWorkArea = mi.Work;
RECT rcMonitorArea = mi.Monitor;
mmi.MaxPosition.X = Math.Abs(rcWorkArea.Left - rcMonitorArea.Left);
mmi.MaxPosition.Y = Math.Abs(rcWorkArea.Top - rcMonitorArea.Top);
mmi.MaxSize.X = Math.Abs(rcWorkArea.Right - rcWorkArea.Left);
mmi.MaxSize.Y = Math.Abs(rcWorkArea.Bottom - rcWorkArea.Top);
}
Marshal.StructureToPtr(mmi, lParam, true);
}
internal static extern bool GetMonitorInfo(IntPtr hMonitor, MONITORINFO lpmi);