I really doubt there are any program capable of doing a such thing. VB.NET and Delphi are far from being the same language. All of the .NET components can't be used in Delphi AFAIK. Unless there's Delphi.NET which I don't think exists.
I'm currently creating (as a hobby) a space invaders like game for mobile using Xamarin, after starting a few larger projects that I also may not have finished
Awesome! you should look at the Atari VCS platform it does not have a huge user base but the one it has is super active at around 11k and they have no games in there store