Triggering an event when an error occurs

How would I fire an event when an error occurs in a class module?

This should give you the idea. Create a new project. Add a class mod. Put a commandbutton onto Form1 and add the following code to the class and form.

VB Code:

' Class mod code
 
Public Event BadMagic(strError As String)
 
Public Sub Hey()
Dim x As Long
 
    On Error GoTo MyError
    
    ' change this to x = 1 /1 to see that event is only called on error
    x = 1 / 0
    
    MsgBox "Calculation a-ok"
    Exit Sub
MyError:
    RaiseEvent BadMagic("Divide by zero error")
End Sub
 
 
' form code
 
' need this to specify that class has events
Private WithEvents c As class1
 
Private Sub c_BadMagic(strError As String)
    ' just popup error msg
   MsgBox strError
End Sub
 
Private Sub Command1_Click()
 
    ' creat new class
    Set c = New class1
    
    ' call class func for processing
    ' if error in this func then c_BadMagic is called
    c.Hey
    
End Sub

Thanks!