VS hasn't a project converter.
Does your app use VCL? or is based in C++ standard? The 2nd option is straight forward. Just create a new project and add source
files from builder project. The 1st option is complicated, you must replace VCL with MFC, WTL or WinForms and itsn't a trivial task
BTW, builder supports almost all the MS C++ extensions so if you use one of those in builder project you won't have any problems in
VC++.