Append an order number in a text file with a string and then save

Hi all,
I am new to VBA and the forum but I have a problem in our business that I am trying to solve.

We have a Tab delimited text file that contains an order number that will be sent to a vendor. Before we send it, we need to append each order number with a string of text. i.e "abc18".

The current process is to import the text file into Excel, Concatenate the text into the order column and then export that back out into a text file. I was hoping to automate this with VBA.

I've been able to automate importing the text file into Excel but I know there has to be an easier way that will not require the user to activate three separate Macros to complete the task:

Option Explicit
Sub ImportTextFile()
Dim vFileName


On Error GoTo ErrorHandle


vFileName = Application.GetOpenFilename("Text Files (*.txt),*.txt")




If vFileName = False Or Right(vFileName, 3) <> "txt" Then
GoTo BeforeExit
End If
Application.ScreenUpdating = False
Workbooks.OpenText Filename:=vFileName, _
Origin:=xlMSDOS, StartRow:=1, DataType:=xlDelimited, TextQualifier:= _
xlDoubleQuote, Tab:=True


BeforeExit:
Application.ScreenUpdating = True
Exit Sub
ErrorHandle:
MsgBox Err.Description
Resume BeforeExit
End Sub

.
You can easily "combine" several macros by inserting a call to the next macro :

Code:

---

Option Explicit


Sub MacroOne()


    'your macro code


    MacroTwo


End Sub




Sub MacroTwo()


    'your macro code


    MacroThree


End Sub




Sub MacroThree()


'  your macro code


End Sub

---