How to change icon of executable in task bar when running

[Autoseek]

Hi everyone,
 
briefly upfront, this is just a "cool gimmick" I would like to implement. This is not "mission critical", and I won't get desperate if I don't find a solution.
 
I have written a little time tracking tool. When the tool is stopped, there is a "red light":

When the tool is running (tracking time), there is a "green light".

When the tool is minimized or the main window is in the background, i would like to see immediately whether the tool is running or not. Since the running executable is shown in the task bar. I thought it would be nice if I could change that small icon displayed in the task bar into "red" or into "green" depending on whether time is being tracked or not, please see a photoshopped example:

I think I have seen programs that can modify their icon during run-time. How can this be done using AutoIt?

Thank you for any suggestions.

Best regards

Autoseek

[Inverted]

You need to add the icons as resources with the AutoIt3Wrapper_Res_Icon_Add directive.

Then you can use TraySetIcon(@ScriptFullPath, -5) to change the icon an time you want.

[Autoseek]

Thank you for your answer. While investigating this, I found the example under TraySetIcon, and I noted that my question was not precise enough. I meant to refer to that part of tray, where the program windows are shown, so more to the left. Still, you sent me into the right direction, and I found a solution with GUISetIcon. So, again, thanks, that was a big help!

BTW, in case anyone is interested. I went to the site Converticon to generate the required ICO-file.

Cheers

Autoseek

Edited May 26, 2014 by Autoseek