THING

Syntax: THING (thingname$)
Location: Fn

This function is used to check whether a Thing is present in memory (ie. whether a given item appears on the Thing list).

If the Thing is present, then the function will return 0, otherwise it will return -7 (not found).

Example:
PRINT THING('Button_sleep')          

CROSS-REFERENCE: 
TH_VER$ is also useful.
