Update control on one form from another

[Jack]

In vb.net how can I update a control on one (open) form from another form or
module.

I have a form that calls a sub on a module and want to have the code in the
module add an item to a list box on the form.

Thanks,

Jack

[Kerry Moorman]

Jack,

One way is to pass the sub a reference to the listbox.

Pass the listbox reference as an argument to the sub. The sub can then add
an item to the listbox referenced in its argument list.

Kerry Moorman
"Jack" wrote:

In vb.net how can I update a control on one (open) form from another form or
module.

I have a form that calls a sub on a module and want to have the code in the
module add an item to a list box on the form.

Thanks,

Jack

[Jeffrey Tan[MSFT]]

Hi Jack,

Kerry has provided you a valid solution. Another way is modifying the
modifier of ListBox reference from "private" to "public", then with the
Form reference, you may manipulate the ListBox easily like this:
form1.listBox1. Items.Add(...)

Note: the default modifier of all windows forms controls are "private". You
may also expose the ListBox reference with a Public property which wraps
the private ListBox reference.

If you have a lot of out-of-form code that need to manipulate the ListBox,
you'd better expose the ListBox reference publicly with either options I
provided above.

Hope this helps.

Best regards,
Jeffrey Tan
Microsoft Online Community Support
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