>Do you think writting 3D game such as flight simulator is possible using vfp5.0 or higher ? Is it complicated to code even any programming language ??

VFP isn't suited for this kind of application. In order to achieve the desired effects, the code should compiled into a native code EXE. VFP is what's referred to as threaded p-code. This in and of itself makes it impractical (for speed reasons) to even attempt this type of application.

I haven't messed around with games for years. It used to be that these were written (as many other types applications were) in assembly language. Even today, it may still be that games are written in C/C++ and then the resulting code optimized in assembler. This, however, is strictly a guess on my part.