Are Mixed Source Formats Possible

Visual Studio 2013

Visual COBOL 2.2

Is it possible to have a managed project where the COBOL program has Variable source format (as defined in the project properties) but with the copy books referenced by the program having themselves a Fixed source format?  I would envision the inclusion of a $SET statement immediately preceding the COPY statement and then another $SET statement immediately following the COPY statement.  Does such a $SET statement exist?

Thanks,

Austin