API procedure, returns the type of the specified setting.
function stg_stype_get(byref stg_name_or_num as string) as byte
0 if the specified setting wasn't found, or
ASCII code of the character representing the setting type: `B` (byte), `W` (word), `S` (string), `D` (dot-decimal string).
Setting name or number. If the supplied string does not start with a digit (0-9), then the string is interpreted as the name of the setting. If the string starts with a digit, then this will be interpreted as the setting number.