(ROSE) Developing addins: Deleting a RoseItem

["G�ntsch, Alexander"]

Hello,   I'm just about developing an addin for rose and trying to implement the following functionality:   In certain cases the user is not allowed to create a new class (for example by clicking the class icon in the toolbar and then in the diagram).   So I registered for the NewModelElementEvent and try to delete the class afterwards:   Public Sub OnNewModelElement(objRoseApp As RoseApplication, objItem As RoseItem)      ...          If aktuelleAnsicht <> ANSICHT.MODELL Then         Dim res As VbMsgBoxResult         Dim aktModell As RoseModel         res = MsgBox("...Message...", vbOKOnly, "Error")         aktModell = objRoseApp.CurrentModel         MsgBox "Name " + objItem.Name + aktModell.GetAllClasses.GetWithUniqueID(objItem.GetUniqueID).Name ' for debug purposes         aktModell.RootCategory.DeleteClass (aktModell.GetAllClasses.GetWithUniqueID(objItem.GetUniqueID))     End If    End Sub   What happens is: When I create a class (and the condition aktuelleAnsicht <> ANSICHT.MODELL is true) the first msgbox appears but not the second one (the one beginning with "Name").   So: If I have a RoseItem that is a class, how can I delete it?   Thank you in advance,   Alexander