Wish #include "file.bas"

[peacemaker]

    #if debug
        #include "sensor1.bas"
    #else if Condition2
        #include "sensor2.bas"
    #End If

 

[Cableguy]

You can already do that, but instead of #include, you dim you sensor using diferent modules.
On complilation o ly the suited module will be aggregated to the final code

 

[LucaMs]

    #if debug
        #include "sensor1.bas"
    #else if Condition2
        #include "sensor2.bas"
    #End If

If you did that, what would happen in all the parts of your code that use members of sensor1 (or sensor2)?!!!
With many, many "#IF"?

 

[peacemaker]

If sensor1.bas, sensor2.bas and sensor3.bas have the same public variables, but different Inline-C code with different C-libs - they can be used optionally with the Main module code that is shared for all, Main can be edited only at one place, without need to have 3 separate projects.