2 replies to this topic

[njciancio]

In this post, with regards to using OnMessage() to call a method of a class, it is stated:

This first parameter is passed as This if a class/object method is called.from OnMessage() as Lexikos already stated.

 

Thus, the this object should be passed as the first parameter, yet it isn't accessible, as below:

Gui, Add, Text, , Click me!
Gui,Show
OnMessage(0x201,"b.a")
class b {
    a(p*) {
        ; "This first parameter is passed as This if a class/object method is called.from OnMessage() as Lexikos already stated."
		msgbox % IsObject(p.1)
    }
}
return
esc::ExitApp

 

Is it possible to access the this object from a method called by OnMessage()? How?

[Lexikos]

"This [The] first parameter" refers to the wParam parameter.

"This" refers to the the variable this, which is a hidden parameter of the function b.a.

 

In other words, this contains wParam, not a reference to an object.  p contains the remaining three parameters

 

Try googling the forum for OnMessage object if you need to know more.

[njciancio]

In other words, I simply cannot refer to this from within a method called by OnMessage() in the same way as I can from within a typical method. Thanks Lexikos!