private void PaintWithDoubleBuffer(ref Message m)
{
using (Graphics g = Graphics.FromImage(myDoubleBufferBitmap))
{
// TODO: use correct background brush for non-standard background
g.FillRectangle(SystemBrushes.Window, 0, 0, ClientSize.Width, ClientSize.Height);
IntPtr hdc = g.GetHdc();
// the treeview ignores the drawing options anyway
Win32Declarations.SendMessage(Handle, Win32Declarations.WM_PRINTCLIENT, hdc, IntPtr.Zero);
g.ReleaseHdc(hdc);
}
PAINTSTRUCT ps = new PAINTSTRUCT();
Win32Declarations.BeginPaint(m.HWnd, ref ps);
using (Graphics g = Graphics.FromHdc(ps.hdc))
{
g.DrawImage(myDoubleBufferBitmap, 0, 0);
}
Win32Declarations.EndPaint(m.HWnd, ref ps);
}
