Counter Strike 1.6 modified main menu. GameUI.dll Created 3 months ago2024-01-14 19:29:22 UTC by indigoer

I found a non-steam Counter Strike 1.6 client that has modified main menu. From what I understand, the author of this client somehow managed to rewrite GameUI.dll. I was looking GameUI.dll source code, but couldn't find any reliable link. Can anybody put me in the right direction? How to I alter the menu and my own tabs?