!$ - String Variable
What It Does
There is a single string variable, !$, defined by the compiler. The variable may be used to hold any character string needed by the programmer during the compilation process. The variable is used extensively in the object system to refer to the name of the class during object creation.
Example
#SET $$ !1
#IFSAME !$ my_symbol
showln "IT'S MINE"
#ENDIF