What did you expect to happen as a result of this code? You have opened a
file for output in a mode that will append new data (when written) to
existing data already in the file. Are you trying to write additional binary
data to the file?

If you are trying to write to a file, look here:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbcn7/html/vats
kchoosingamongfileiooptionsinvisualbasicnet.asp

OTOH, if you are trying to execute the file:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vblr7/html/vafc
tshell.asp