Jan 23, 2013 · @EduardoPignatelli, The relationship between 'sender' and 'Button' in the inheritance hierarchy, is that they are both 'object' types. 'sender' is simply a wrapper for an 'object' type. When unboxed at run-time, the underlying instance of the wrapped object is projected to the capturing class. In this case 'Button'.

Nov 14, 2013 · I have the following VBA code which is meant to send an automatic email when a specific subject is received. Private WithEvents Items As Outlook.Items Private Sub Application_Startup() Dim objNS

var rectangle = sender as Rectangle; There are two possibilities: sender is a type that can be assigned to a Rectangle, in which case, rectangle will contain a reference to the same object but typed as a Rectangle instead of just object; sender is of some other type, in which case rectangle will be null, which is caught in the following check.

Jan 6, 2012 · About events, the sender parameter is always the object that generated the event (for example a Button in a Click event on a button). If you want to pass arbitrary data in a custom event, inherits from EventArgs and pass it as the second argument.

I know this is a very old post but in Framework 4 you can cast the sender as a Control: Control cntrl = (Control)sender; cntrl.Text = "This is a " + sender.GetType().ToString(); Note you are only able to reference controls that all of the different controls have in common (ie Text).

Sep 23, 2010 · The line simply casts sender to a CheckBox. Why? The event handler signature for the CheckedChanged event is: CheckChanged(object sender, EventArgs e) So, you need to cast sender back to a CheckBox if you want to use any CheckBox specific functionality - object doesn't have much that you can use...

Mar 21, 2017 · The sender and e arguments are the standard signature of event handlers. Sender is the object that raised the event and e contains the data of the event. All events in .NET contain such arguments. EventArgs is the base class of all event arguments and doesn't say much about the …

Dec 24, 2021 · msg.sender (address): means sender of the message (current call) on the other hand. address owner = msg.sender; The msg.sender is the address that has called or initiated a function or created a transaction. Now, this address could be of a contract or even a person like you and me. That's why you may use msg.sender instead of msg.sender()

Jun 23, 2014 · In C# you can access the sender's email address using the SendUsingAccount.SmtpAddress property of the Outlook MailItem. It returns a string object. VB.net should be similar. string sender = mail.SendUsingAccount.SmtpAddress; where mail is an Outlook.MailItem

Jul 21, 2014 · (object sender, XXArgs e) where XXArgs is a class that inherits from EventArgs. sender is, well, the sender of the event. In your example, if you click on a button, the button will fire the event using its own instance reference (this) for the sender parameter (so sender is a reference to your button). This is useful because you don't need to ...