> The problem might be because the function writes the selected file name back 
> into arq

Great work!

That behaviour is uncommon, but indeed stated in IUP docs! What should work is 
allocating a large string with newString(4048) and then assigning chars one by 
one, or maybe assigning string first, and then calling setLen() with large 
size. But such a low level interface in IUP is really an ugly trap. 

Reply via email to