>>I mean using a non-visual class which implements the SOAP Toolkit interface. Then, in your visual code, you do something like:
>>
>>

>>this.oSoap = NewObject( "MichelSoap", "MichelSoap.prg" )
>>BindEvent( this.oSoap, "YourHook", this, "CustomDelegateMethod" )
>>

>>
>>where CustomDelegateMethod it is a method you added to your form that acts as a delegate for the object YourHook event.
>
>What does the this, as the 3rd parameter, means?

You should read it as: Bind the event YourHook from the object this.oSoap, to the method CustomDelegateMethod of the object this (in this context, your form).

Try this to understand BindEvent. Create a blank form and put just:

* Form Init
BindEvent( _Screen, "Resize", this, "MyDelegate" )

* Create a MyDelegate custom method and write this code in in:
this.Caption = transform( _Screen.Width ) +" x "+ transform( _Screen.Height )

Now run the form and resize the VFP desktop to different sizes. Your form will trap the event and reflect it in its caption.

Hope this helps,