internal static extern bool GetMonitorInfo(IntPtr hMonitor, MONITORINFO lpmi);
public void WmGetMinMaxInfo(IntPtr hwnd, IntPtr lParam)
{
var structure = (MINMAXINFO) Marshal.PtrToStructure(lParam, typeof (MINMAXINFO));
var hMonitor = Win32.MonitorFromWindow(hwnd, 2);
if (hMonitor != IntPtr.Zero)
{
var monitorinfo = new MONITORINFO();
Win32.GetMonitorInfo(hMonitor, monitorinfo);
var rcWork = monitorinfo.rcWork;
var rcMonitor = monitorinfo.rcMonitor;
structure.ptMaxPosition.x = Math.Abs(rcWork.left - rcMonitor.left);
structure.ptMaxPosition.y = Math.Abs(rcWork.top - rcMonitor.top);
structure.ptMaxSize.x = Math.Abs(rcWork.right - rcWork.left);
structure.ptMaxSize.y = Math.Abs(rcWork.bottom - rcWork.top);
structure.ptMinTrackSize.x = (int) MinWidth;
structure.ptMinTrackSize.y = (int) MinHeight;
}
Marshal.StructureToPtr(structure, lParam, true);
}