Determine which form was the sender

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I have a form (form1) with a webbrowser which can be opened by many forms. Depending on which form opens this form the webbrowser will open to a different URL.

I tried something like this

VB

If sender Is frmRegInState Then
            Me.WebBrowser1.Url.ToString = ("www.yahoo.com") Then
            frmRegInState.Close()
        ElseIf sender Is frmRegOutOfState Then
            Me.WebBrowser1.Url.ToString = ("www.google.com") Then
            frmRegOutOfState.Close()
        End If

Posted 15-Aug-12 9:08am

wiswalld

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[no name] 15-Aug-12 15:14pm

Okay good for you! Thanks for keeping us up to date on your progress.

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Philip Stuyck · Answer 1 · 2012-08-15T10:23:00

Create an interface with a url property like this :

C#

public interface IUrlOwner
    {
        Uri Url
        {
            get;
            set;
        }
    }

Then make your form implement this interface. So the form will know which url to open.
like this :

public partial class DrawingWindow : Form,IUrlOwner

Of course you have to implement the interface. so you need a concrete getter and setter.
Then you can cast the sender to the interface and get to the url in your event handler.

C#

(sender as IUrlOwner)Url

My code is more like C# but I hope you know enough about VB.NET to understand what is going on here.