>>Could the feature be a read/write property of the control? That way I have full control on what the prefix would be.

 

Yes.  This is an example:

                    

                    Dim tempsecurity As String = ""
                    If role = "Admin" Then
                        tempsecurity = ""
                    ElseIf role = "Registered" Then
                        cntlCE.SetSecurityFileNamePrefix("Member_")
                    ElseIf role <> String.Empty Then
                        cntlCE.SetSecurityFileNamePrefix(role & "_")
                    End If 

>>In addition, I think the prefix should be invisible to the user. For example, if I prefix image1.gif with company1_image1.gif, then the upload images windows should simply display image1.gif. Let me know what you think.

 

This feature can't be achieved right now.