I've just upgraded from vs6.0 to vs2005 and am trying to compile my old project(VS6.0) with it. After sorting out my initial problem with the winnt.h file and then a sprintf function call error, I've now got it successfully compiled but when I try to run it, I get an assertion failure with a _seekl file line 66, I think for the open file function. Is this file file not compatible with VS8, is there a new function or file or something else I need to use. ?

If you're using Standard C++ or C, then you shouldn't have any troubles compiling your application with (almost) any C++ compiler. You could try out an alternative IDE like Code::Blocks.

Thanks, I'm downloading it now!