Thanks, Jess.

However I've these questions for each options:

1) Although this is what I've been practising, I still don't know the reason for making the external name and property name consistently the same. Note that, even if I am doing this, I still receives the error msg.

2) a) If I already have issued:
DO FORM MyFormName Name MyFormName
then, why callout:
MyFormName.Activate()
(wouldn't this method naturally be executed?)

b) since my external name and property name are already the same, would this be just a redundancy?

3) If I'll use option 3, how am I going to know the index for the form that I intend to use?

I am testing these commands (do you think their OK?):

IF TYPE('_SCREEN.ACTIVEFORM') = 'O' AND PEMSTATUS(_SCREEN.ActivForm, 'CloseEvent',4)
_SCREEN.ActiveForm.CloseEvent()
ENDIF

Another thing, If I make the child form's WindowType = 1-Modal, it seemed to work but the problem is I don't want the child to be modal. I sure wish MS could be more detailed with how they describe their VFP objects!

Again , many thanks for a very helpful assistance.