I need a procedure that will accept one parameter. This parameter may contain the value I want or it may contain the name of a variable that contains the value that I want. Here are some examples.

PROCEDURE cMyFunc( uMyVar )
... What code goes here?
RETURN cReturnValue
ENDPROC

x = "test"
cMyFunc( x ) should return 'C'

x = 5
cMyFunc( x ) should return 'N'

x = "5"
cMyFunc( x ) should return 'C'

x = .T.
y = "x"
cMyFunc( y ) should return 'L'

How do I figure out if a character parameter contains the name of another variable?

Any ideas?