[Lazarus] TControl.Click?

[Hans-Peter Diettrich]

Mattias Gaertner schrieb:

>>>>> "Assigned" is used instead of "FOnClick<>nil"
>>>>
>>>> What is different between check the Method fields ?
>>>> "Assigned(FOnClick)" and "FOnClick<>nil"
>>>
>>> http://wiki.lazarus.freepascal.org/IDE_tricks#Events_.28Method_properties.29_in_the_Object_Inspector

>> Thanks, but not understand it, but i will to check and correct my components
>> code.
> 
> What do you don't understand?

The many "Do not ..." hints are not really helpful without understanding 
method pointers and Assigned().

In detail I supposed that FOnClick<>nil will never work properly, on no 
method pointer, because it only checks the first pointer (explanation in 
Delphi newsgroups).

The documentation of Assigned() also is not really helpful, there's no 
explanation of the real difference vs. P<>nil. There seem to exist more 
differences, e.g. with the "dummy" event handler value at design time?

DoDi