asked on

Addressing controls created at runtime

Hi,

I am creating a number of controls on a form at runtime. I am storing pointers to these controls in a TList on creation.

How do I use the entries in TList to access the properties and methods of the control or do I even need to do this to access the properties of the controls?

Thanks

BlackMan

You need to typecast them, like TButton(MyList[1]).Caption. That also means that you need to know what type the objects are, otherwise you can typecast them to the lowest common object and use the properties defined on that object (f.ex. TComponent)

ChrisBerry

ASKER

Thanks, just what I wanted.

Just one thing - why when a property/event like OnMouse... is declared in the heirarchy at the TObject or TWinObject (I forget which) can I only access it at the, say, TEdit level?

Please lock the question so I can hand you the points.

Regards

Chris

chrismo

To your second question - because the lower level components publish these properties that were previously declared public or protected...

chrismo

To your second question - because the lower level components publish these properties that were previously declared public or protected...

ChrisBerry

ASKER

Thanks chrismo,

I wish to reject your answer because BlackMan gave the main answer I was looking for. If he does not lock within the next day or so please feel free to lock again and I will pass the points to you.

ASKER CERTIFIED SOLUTION

BlackMan

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

chrismo

No problem - I didn't realized I posted twice - I meant to just post a comment as I knew I wasn't answering the main question.