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How to determin which component triggered an event?

Posted on 2002-04-05
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Last Modified: 2010-04-02
I am working on my first windows project in Borland C++ and I can't seem to figure this out:

I need to have an array of components, or some way of quickly stepping through each one so I can duplicate the values, I chose an array.

I define my componenets:

TCheckBox ListBox[MAX_ITEMS];
 
for (count=0;count<MAX_ITEMS;count++) {
     ListBox[count] = new TCheckBox(this);
     ListBox[count].Top = 35;
     ListBox[count].Tag = count;
     // other properties and stuff ...
     ListBox[count].OnClick = &EntryDuplicate;
}

My question is how can I access the properties of the
TCheckBox componenet that triggered the event from the event?

Thanks in advance.
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Question by:philtwo
  • 2
3 Comments
 
LVL 6

Accepted Solution

by:
thienpnguyen earned 300 total points
ID: 6921443
void __fastcall TForm1::EntryDuplicate(TObject *Sender)
{
    // assume, you click on your TListBox
    TListBox *listbox = (TListBox *) Sender;
    listbox->Top = 10;
    //....

}
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LVL 6

Expert Comment

by:thienpnguyen
ID: 6921461
Other way,

void __fastcall TForm1::EntryDuplicate(TObject *Sender)
{
   TListBox *listbox = dynamic_cast<TListBox*>( Sender );
   if( listbox != NULL )
   {
       listbox->Top = 10;
        //....
   }

}
0
 

Author Comment

by:philtwo
ID: 6921921
Asbolute life saver - thanks alot!!
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