im not thinking they used basic. my guess is they used c and assembly to create windows. and maybe some c++. i couldnt find anything to prove what windows was writen in but im pretty sure it was c and assembly

The two have no relationship to each other. Billy "programmed" BASIC for the Altair 8800 in 1976 (actually, according to the evidence, he dumpster-dived Digital BASIC), the first version of Windows wasn't started until about 6 years later--by which time Gates was no longer a "programmer".

As was pointed out earlier, Windows is a mixture of C and machine language.

just having the thought of coding windows in BASIC is already a nightmare. Imagine all the lines of codes that you'll have to do just to make a window move with a mouse showing all its contents... geeesshh...

it would be too slow with basic anyway. Its a combination of C, assembly/machine code.

They used C, which explains why Windows crashes so often.

That's an ignorant overgeneralization. You meant to say "The used C poorly, which explains why Windows crashes so often."

William Gates' claim to the "Programmers Hall of Fame" is DOS, specifically MS-DOS for the the first IBM PC. I think that was written in assembler. It was a great achievement in those early PC days. This comes from a person who used some of the alternative disk operating systems.

The graphical user interface called Windows came later, patterned after an effort at Xerox, and later the Apple Lisa computer. A graphical user interface would have been too much for the slow speed and limited memory of early PCs.

I have heard that present day Windows and the .Net framework are being increasingly written in C# (Csharp) rather than the more traditional C++

Except that Gates didn't write DOS, he purchased it from some guy for like $10k or something and then turned around and sold it to IBM for tons more money than he paid.