Handling Errors in SAP GUI Scripting Code

You can take reference from GUI Scripting help section and it can explain things in detail.

It provides you default property types as per requirement. If you want to perform next step, stop or abort user step, you can use the following properties.

See the below code that uses above property type to display different messages −

Public Sub get_status_bar_value_exit_if_Error()
   Dim usr_resp AsString
   If(session.findById("wnd[0]/sbar").messagetype = "E"Or
      session.findById("wnd[0]/sbar").messagetype= "W") Then
   usr_resp =MsgBox(session.findById("wnd[0]/sbar").Text & Chr(13) &"Show the Error in SAP ?",
vbYesNo)
    If usr_resp =vbYes Then
 Else
    Callgo_to_Sap_home
 End If
 End
 End If
End Sub