Use WindowDefinedHow as optional parameter for the IsDefined method to see how a particular string definition has been defined: as a method, not as a method but as some other definition, or to find out if the string is defined in the DATACLASS at all.
4Test defines this enumerated data type as follows:
[-] type WINDOWDEFINEDHOW is enum [ ] DEFINED_ANY [ ] DEFINED_METHOD [ ] DEFINED_NOT_METHOD
Each field is defined as follows:
DEFINED_ANY returns true if the string is defined.
DEFINED_METHOD returns true if the string is defined as a method.
DEFINED_NOT_METHOD returns true if the string is defined but not as a method (for example, it might be defined as a property or member) and false if the string is defined as a method.