You need to make a few changes to get ScriptBasic to run as a CGI program under Apache for Windows.
httpd.conf
# To use CGI scripts outside of ScriptAliased directories:
# (You will also need to add "ExecCGI" to the "Options" directive.)
#
AddHandler cgi-script .cgi .bas (or whatever you would like to use as an attribute)
# First, we configure the "default" to be a very restrictive set of
# features.
#
<Directory />
Options FollowSymLinks +ExecCGI
AllowOverride None
</Directory>
The first line of your script should look something like this.
#!G:/ScriptBasic/bin/scriba.exe -c
