The file handler mapping procedure to environment variables should be identical between native and managed code applications. I just tested here using VC 2.3 and it works in a managed code project by setting the dd_OLD environment variable either in the app.config file or directly in the environment of the computer. I used: select test-file assign to "OLD\testfile.dat" and set dd_OLD = C:\temp and when I opened the file it correctly found c:\temp\testfile.dat What product version are you using?
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