getting save as file name in word

In the code below the file name is hard coded, but I want the user to be able to pick it.

I was reading about GetSaveAsFilename but I get an error when using it: "method or member not found".

fileSaveName = Application.GetSaveAsFilename _
     (fileFilter:="Excel Files (*.txt), *.txt")
 

This is written for Word 2010. Am I wrong in thinking GetSaveAsFilename is available in word VBA?

 Sub Macro3()
 '
 ' Macro3 Macro
 '
 '
     ActiveDocument.SaveAs2 FileName:="Questionnaire01-05-20122.txt", _
         FileFormat:=wdFormatText, LockComments:=False, Password:="", _
         AddToRecentFiles:=True, WritePassword:="", ReadOnlyRecommended:=False, _
         EmbedTrueTypeFonts:=False, SaveNativePictureFormat:=False, SaveFormsData _
         :=True, SaveAsAOCELetter:=False, Encoding:=1252, InsertLineBreaks:=False, _
          AllowSubstitutions:=False, LineEnding:=wdCRLF, CompatibilityMode:=0
 End Sub
 

cheers

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