private void WmNccalcsize(ref Message m)
{
base.WndProc(ref m);
if (this.RenderWithVisualStyles())
{
NativeMethods.NCCALCSIZE_PARAMS nCCALCSIZE_PARAMS = default(NativeMethods.NCCALCSIZE_PARAMS);
NativeMethods.RECT rECT;
if (m.WParam == IntPtr.Zero)
{
rECT = (NativeMethods.RECT)Marshal.PtrToStructure(m.LParam, typeof(NativeMethods.RECT));
}
else
{
nCCALCSIZE_PARAMS = (NativeMethods.NCCALCSIZE_PARAMS)Marshal.PtrToStructure(m.LParam, typeof(NativeMethods.NCCALCSIZE_PARAMS));
rECT = nCCALCSIZE_PARAMS.rgrc0;
}
IntPtr windowDC = NativeMethods.GetWindowDC(base.Handle);
IntPtr hTheme = NativeMethods.OpenThemeData(base.Handle, "EDIT");
NativeMethods.RECT rECT2;
if (NativeMethods.GetThemeBackgroundContentRect(hTheme, windowDC, 1, 1, ref rECT, out rECT2) == 0)
{
rECT2.Inflate(-1, -1);
this.borderRect = checked (new NativeMethods.RECT(rECT2.Left - rECT.Left, rECT2.Top - rECT.Top, rECT.Right - rECT2.Right, rECT.Bottom - rECT2.Bottom));
if (m.WParam == IntPtr.Zero)
{
Marshal.StructureToPtr(rECT2, m.LParam, false);
}
else
{
nCCALCSIZE_PARAMS.rgrc0 = rECT2;
Marshal.StructureToPtr(nCCALCSIZE_PARAMS, m.LParam, false);
}
m.Result = new IntPtr(768);
}
NativeMethods.CloseThemeData(hTheme);
NativeMethods.ReleaseDC(base.Handle, windowDC);
}
}
private static void ExtractParamsAndWindowRect(
ref Message m,
out NativeMethods.NCCALCSIZE_PARAMS parameters,
out NativeMethods.RECT windowRect)
{
if (m.WParam == IntPtr.Zero)
{
parameters = new NativeMethods.NCCALCSIZE_PARAMS();
windowRect = NativeMethods.PtrToStruct<NativeMethods.RECT>(m.LParam);
}
else
{
parameters = NativeMethods.PtrToStruct<NativeMethods.NCCALCSIZE_PARAMS>(m.LParam);
windowRect = parameters.rgrc0;
}
}
