Modernize Borland Builder V5 application?

James Newton wrote 05/28/2019 at 18:10 0 points

We have a program in Borland builder v5 and we want to update it to a modern development environment that targets cross platform. It's C++ code (NOT Pascal) and was written with a good division between the object actions and the object GUI, so tearing out the borland GUI stuff and replacing it with something else should be relatively painless. 

Whats the current standard for cross platform GUI development? 

Any easy path for migration? Or suggestions to reduce the migration pain?