Hi Adam Deptula,

-D and -L parameters are reserved for the executable file:

-LFileName
Specify a resource file, including a path if necessary, other than the default, vfp*ENU.dll, so you can use Visual FoxPro in a language other than the current language specified by Windows.

-DFileName
Specify a runtime library file, such as vfp9r.dll.

For example,
test.exe -Daaa\vfp9r.dll -Lbbb\vfp9renu.dll

Best regards.

Chen
2013.3.5