so i looked for official sources on this but couldn‘t find any. I‘d like to create custom windows/explorer icons that change not just their size but sometimes whole look depending on usage (just like the standard windows/microsoft/explorer icons do). From what i have read gimp can create .ico files, but i guess they‘re just the same image in different resolutions?!
So the question is how to PROGRAMICALLY/by hand create an .ico (or .dll) image file (of the descriped ‚type‘)?
An official source on the structure of an .ico file would be a nice additon. And please don’t recommend any software..