Simple question: How to reference the currently open item

[cthaxter]

I need to know what the code is for assigning the currently open item to a variable. I've looked around for the answer but can't find it.

More specifically, I want to put in an Outlook form the following code:

Sub Item_Save
   NewMC = "IPM.Contact.ITU"
   CurrentItem = '????
   If CurrentItem.MessageClass = "IPM.Contact" Then
      CurrentItem.MessageClass = NewMC
   End If
End Sub

where I need to assign to CurrentItem the currently open or selected contact item, and "ITU" is the name of the form that I'm creating.

Also, for those who may know, what are the various events that one can put after Item_ ? I know Item_Open executes when the item opens, but I need to know whether and how Item_Save and Item_Close work, and what other possibilities there are.

Thank you very much.