I want to upgrade my sizeable VB6 application - which uses tons of 
structures with fixed-length strings, fixed-size arrays, etc - to VB.Net. 

Assuming I make all of the necessary adjustments (marshaling, etc) 
necessary to make file handling work correctly in VB.Net, Would the VB.Net 
application read files created in the VB6 version correctly into the 
converted structures? 

would my VB6 application be able to read data files created in VB.Net into 
the VB6 [User Defined Data] Types accurately?

What I'm getting at is that we already have an installed customer base 
with tons of existing data created using our VB6 version. 

Ideally, a change to VB.Net would be transparant to the end user (at least 
as far as having to convert data). We want to make sure we aren't gonna 
bomb the existing data files.

--Hal