vba problem
It is known issue because of AutoCAD VBA being 64bit since AutoCAD 2014, if the installed AutoCAD is 64bit. There are simply very few 64-bit equivalents to 32-bit VB/VBA components to use.
If your VBA program only needs to have an open file dialog, you can use VBA code to call Windows API. See this discussion:
However, if you have relatively complicated VBA program that uses 32-bit UI components/ActiveX Controls, you would not be lucky enough to find 64-bit equivalent to port your old 32-bit VBA to 64-bit. You probably need to rewrite the program with newer technology, such as AutoCAD .NET API.
