Variables in File Parameter

Is there a chance to use variables (registers) as parameter for the File function?

e.g. File $1\Test.txt (does not work)

Variables are for runtime, but source file location (File) must be interpreted at the compile time. If you want check compile time dependencies and build paths accordingly, some tricks with additional exe and dynamic include file are available http://forums.winamp.com/showthread....hlight=execute

Thank you