>>>So, by doing the following code, (Confirm)sender, the (Confirm) is type casting the sender object to type Confirm? Is that what you are saying.
>
>It's really not so weird to a VFP person once you use it a few times, Cecil.
>
>Compare these two statements:
>Assume that the variable a has been defined as type decimal.
>VFP
>b = INT(a)
>
>C#
>int b = (int) a
>
>With VFP we put the () around the argument. With C#, we put the () around the function.
>It's still just a function and an argument, but a different convention that accomplishes the same result.
>.

I think you need to be careful using that analogy. In your example (both VFP and C#) you are actual making a type conversion.
In Cecil's case the cast is from a base class to a derived class so 'sender' must already be of type 'Confirm' (or a class derived from it). No conversion is taking place....