private void WmNCCalcSize(ref Message m)
{
// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/windows/windowreference/windowmessages/wm_nccalcsize.asp
// http://groups.google.pl/groups?selm=OnRNaGfDEHA.1600%40tk2msftngp13.phx.gbl
var r = (RECT)Marshal.PtrToStructure(m.LParam, typeof(RECT));
var max = MinMaxState == FormWindowState.Maximized;
if (max)
{
var x = NativeMethods.GetSystemMetrics(NativeConstants.SM_CXSIZEFRAME);
var y = NativeMethods.GetSystemMetrics(NativeConstants.SM_CYSIZEFRAME);
var p = NativeMethods.GetSystemMetrics(NativeConstants.SM_CXPADDEDBORDER);
var w = x + p;
var h = y + p;
r.left += w;
r.top += h;
r.right -= w;
r.bottom -= h;
var appBarData = new APPBARDATA();
appBarData.cbSize = Marshal.SizeOf(typeof(APPBARDATA));
var autohide = (NativeMethods.SHAppBarMessage(NativeConstants.ABM_GETSTATE, ref appBarData) & NativeConstants.ABS_AUTOHIDE) != 0;
if (autohide) r.bottom -= 1;
Marshal.StructureToPtr(r, m.LParam, true);
}
m.Result = IntPtr.Zero;
}
public static extern int SHAppBarMessage(uint dwMessage, [In] ref APPBARDATA pData);