How change Icon Overlay by file extencion

[cassio-vo]

if is txt file i want show a green icon, but if isn't a txt file i want show a blue icon.

[JereckNET]

You would need two handlers.

One for the green icon :

protected override bool CanShowOverlay(string path, FILE_ATTRIBUTE attributes) {
   FileInfo fiPath = new FileInfo(path);

   return (fiPath.Extension.Equals(".txt"));
}
protected override Icon GetOverlayIcon() {
   return Properties.Resources.GreenIcon;
}

And another one for the blue icon :

protected override bool CanShowOverlay(string path, FILE_ATTRIBUTE attributes) {
   FileInfo fiPath = new FileInfo(path);

   return !(fiPath.Extension.Equals(".txt"));
}
protected override Icon GetOverlayIcon() {
   return Properties.Resources.BlueIcon;
}