I had just graduated graduate school for international economics, and was working for a government contractor who only hired me because I had a masters (they could charge the government more). Because of this, I literally had nothing to do and would just sit in the office.
I eventually figured out an excuse to get my employer to buy Photoshop for me and I started learning it on company time. When Winamp came out with the update to add skins, I ended up making one of the very first skins (meshAMP) which became really popularly.
https://archive.org/details/winampskins_meshAmp
(I am cringing looking at it now)
This led to contract job with STB (to design interfaces for a TV Tuner card they had) and eventually 3DFX (paid in 3d video cards), and eventually a career change and a job as a graphic designer.
Except, I was not a good designer, so I quickly learned to program (ASP.net and then JAVA), which led to Macromedia Flash, which led to Macromedia Generator, which eventually led to a job offer from Macromedia (now Adobe), where I still am (sadly, sans Flash).
Anyways, thank your WinAMP!
Anyway your winamp skin is cool
Skinning was pretty easy to do. The packaging format was a zip archive with a renamed extension. You could do a lot with a little photoshop skills and trial and error.
So many people used it that skins would get a lot of distribution, too.
Here's an example: http://www.delphicorner.f9.co.uk/articles/forms4.htm
It was a long time ago, but IIRC I was using Visual C++ (a very nice compiler that was the first to implement the STL as written) having abandoned Borland Foundation Classes (? name ?) which was dreadful. Woeful.
MFC, the MS C++ offering for writing Windows apps was impossible to use and undocumented at the time. We subscribed to those piles of CDs that MS would send out regularly and I could only find decent documentation for the C API, not the MFC one. Weird.
I used an explicit event loop (simple for a Computer Science graduate like I was) and the C API inside my C++ programme and it worked a treat
Those were (not) the days....
This was back in 96-97?