[Mono-winforms-list] How to Paint NonClient Area

András Mocsáry amocsy at gmail.com
Tue Feb 23 21:43:54 EST 2010

I'd like to ask for help on how to paint the nonclient area under mono using

I've read that mono emulates the msg codes like WM_NCPAINT, thus I wrote:

        protected override void WndProc(ref Message m)
            base.WndProc(ref m);
            //WM_NCPAINT =0x0085
            if (m.Msg == 0x0085)//nonclient paint
                Graphics g = Graphics.FromHwndInternal(this.Handle);
0, 0);
But does not works.

Under widnows I used:
                IntPtr pTarget = GetWindowDC(targetHandle);
                Graphics thisGraph = Graphics.FromHdc(pTarget);
                thisGraph.DrawImage(sourceBitmap, 0, 0, wdth,
                ReleaseDC(targetHandle, pTarget);
Note that under windows it can be pointed to any other window. For the
project that's not necessary.
On the contrary, it would be best if a purely managed solution would exists,
which would run under most mono platforms.

Thx for your advice

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