TransparencyKey not working correctly

[3Dizard]

Asked that question before, but didn't get an answer to my question. My problem is the following: I'd like to make my standard Form completely transparent. To do that I set TransparencyKey property to BackColor: private void Form1_Load(object sender, System.EventArgs e) { this.TransparencyKey = this.BackColor; } This way the form in fact becomes transparent, but when it is shown, there is a short black flicker until the background gets transparent. A way I figuered out to get rid of that is to set the BackColor to pure black, too: this.BackColor = Color.Black; But this is no satisfying solution. To figure out what was going on I replaced the OnPaintBackground function with my own one, which simply does nothing: protected override void OnPaintBackground(PaintEventArgs e) { //empty } The result is a black background. This background doesn't appear when BackColor is set to black as mentioned above. Does this happen on your machines, too? Thanks, 3Dizard

[Stanciu Vlad]

3Dizard wrote: This way the form in fact becomes transparent, but when it is shown, there is a short black flicker until the background gets transparent. I noticed that to, and I haven't figured out why. But this "problem" appears at the first call, so if you change the opacity or the transparency key the second time it doesn't acts like the first one. I hope you understand...

[leppie]

Look at Control.SetStyle() and specifically ControlStyles.SupportsTransparentBackColor top secret xacc-ide 0.0.1