[justbuchanan]

There are two constructors for the solenoid class:

Solenoid(UINT32 channel);
Solenoid(UINT32 slot, UINT32 channel);

To use a non-default cRIO port, you must use the second constructor. The slot tells the solenoid which port the breakout is in the cRIO.

example:
Solenoid *mySolenoid = new Solenoid(7, 1);