Max asked:

> Is FBtoC confused by the single quotes within the double quotes?


Max,

Have you tried by dropping the single quotes and compiling with:

winTitleStr = "Serial Port Open C Demo"

If that works, you have your answer and can proceed with finding a  
solution or workaround, perhaps:

winTitleStr = "Serial Port" + "'" + "Open C" + "'" + "Demo"

Ken

p.s. This window title string will fit in as Str31, but you know that.