That is not an accurate reproduction of the classic Windows UI. The 3D bevels on buttons and other beveled elements are wrong and make it look more like Motif if anything.
Wow, I initially thought that the first dialog box was a screencap of a "real" one...
Impressive!
Pixel-aligned non-antialiased interfaces make it so much easier to reproduce. Good luck emulating current-gen desktop OS rendering on a different software and hardware stack...
Easy to criticize, hard to actually build something.