I am trying to modify a current MFC application running on Windows NT4 to use boost libraries for ethernet communcications (originally, it used CommX for serial) and general increased performance, effieciency, and clarity of code. I started out modifying it in VS2010, but I found that I was unable to produce a valid NT4 app with VS2010. I googled the issue and found that VS2005 was the last version able to create an NT4 app. I got everything to compile in VS2005, but found that I had to change certain #define statements in stdafx.h in order to get the app to run on NT4. However, even after doing that, when I execute the program on NT4, it immediately quits with no error. It doesn't show anything. I even checked the Task Manager processes while executing it. It is like it never executed at all. I got desperate and tried compiling the app in VS2003, but I got so many errors that I gave that up. My last attempt was VC6, but again, I got 262 errors and started wondering whether it was even possible for boost to run in VB6 or on an NT4 machine. This is a very tight-schedule project, so any (prompt) help would be very appreciated! Thank you!