@FellippeHeitor  What would be extremely helpful, not just with debugging but other things as well, is a having a message box modal dialog for QB64, either use Windows Api call or QB64 routine. 
We could get some inside info from program without ruining the output screen.
If I get really desperate for debugging I threaten myself with dragging my message box code in to use. So far never that desperate to drag that clunky thing in but when I review oh, I might just add it to Interpreter. 
Oh my reply answers same point as 
@mdijkens ha, ha, great minds think alike! :)