I have a program that open an excel file from select cell by asking the work
order number (see below). What statement do I need to get a window message
when I type the wrong work order number?.

Thanks in advance.
Maperalia


Sub Open_xls_File()

WO = Application.InputBox("Enter Work Order Number")
directory = "C:\Test\Colors\" & WO & "\"
filetext = Selection.Value
Workbooks.Open directory & filetext

End Sub