Can OnEraseBackground be overridden in C#?

Question

I'm trying to skip the clearing of the Client Rectangle before onPaint gets called. thanks, Sorin

jcity444 · Answer

I believe the code below does this and also produces double buffering, just place it in the constructor of your form after initialize component: // Activates double buffering SetStyle(ControlStyles.UserPaint, true); SetStyle(ControlStyles.AllPaintingInWmPaint, true); SetStyle(ControlStyles.DoubleBuffer, true); A more direct solution is that you can also override the wndproc event and trap the erase background message before it gets to paint: protected override void WndProc(ref System.Windows.Forms.Message m) { // Code courtesy of Mark Mihevc // sometimes we want to eat the paint message so we don't have to see all the // flicker from when we select the text to change the color. if (m.Msg == WM_ERASEBKGND) { if (_Paint) base.WndProc(ref m); // if we decided to erase background else m.Result = IntPtr.Zero; // not painting, must set this to IntPtr.Zero if not painting otherwise serious problems. } else base.WndProc (ref m); // message other than WM_PAINT, jsut do what you normally } } -Mike G

Can OnEraseBackground be overridden in C#?

Answers (1)