Question about Prepared statements.

How are prepared statement id's defined in ESQL/C? Are they defined as global variables, as local variables, or as global within a source file? I haven't seen anything in the documentation, but I could have sworn that an Informix instructor said that they are global. I have two prepared statements that have the same name, but they do two different selects. They seem to be working properly, but I don't want any unexpected results down the road. Thanx in advance, Joe.