A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hi,
I assume the CboNum is a ComboBox. Right click the combobox 'View Code' and paste this code in.
You should edit the message to whatever is appropriate.
Private Sub CboNum_Exit(ByVal Cancel As MSForms.ReturnBoolean)
If CboNum.Value = "" Then
MsgBox "You must select a number in the combobox"
Cancel = True
End If
End Sub