Hi, this is what i need to do:

1. Choose a folder from the Hard Drive.
2. Inside the choosen folder, i have some rtf files.
3. Loop between those files to open them and then convert them to pdf (using the included plugin on word 2007).
4. Close the files (if the conversion can be done without even open the documents would be great, there are lots of documents).

I know it should be a simple task for most, but i'm more than new to this world. Thanks in advance to everyone.

I've managed to create the following macro, but it just open the document and does nothing afterwards or word just generates an error and closes (most of the time):

Code:
Option Explicit
Sub SavePDF()
'
' SavePDF Macro
' Save documents in PDF format
'
Dim txtFolder As String, a, f
Dim strNombreArchivo As String

  'Get an existing txt folder name
  txtFolder = GetFolder
  If txtFolder = vbNullString Then Exit Sub

    a = GetFileList(txtFolder & "*.rtf")
    
  If Not IsArray(a) Then
   MsgBox "No rtf files found on: " & txtFolder, vbCritical, _
   "Macro Ending"
   Exit Sub
  End If
  
  'Iterate the txt files, open, SaveAs PDF
    Application.DisplayAlerts = False
    For Each f In a
      Documents.Open FileName:=f, ConfirmConversions:=False, ReadOnly:= _
        False, AddToRecentFiles:=False, PasswordDocument:="", PasswordTemplate:= _
        "", Revert:=False, WritePasswordDocument:="", WritePasswordTemplate:="", _
        Format:=wdOpenFormatAuto, XMLTransform:=""
        
      'strNombreArchivo = ActiveDocument.Name
      
      'ChangeFileOpenDirectory "C:\Macro\"
      ActiveDocument.ExportAsFixedFormat OutputFileName:=strNombreArchivo, _
        ExportFormat:=wdExportFormatPDF, OpenAfterExport:=False, OptimizeFor:= _
        wdExportOptimizeForPrint, Range:=wdExportAllDocument, From:=1, To:=1, _
        Item:=wdExportDocumentContent, IncludeDocProps:=True, KeepIRM:=True, _
        CreateBookmarks:=wdExportCreateNoBookmarks, DocStructureTags:=True, _
        BitmapMissingFonts:=True, UseISO19005_1:=False
      
     'Workbooks.Open f
     'Edit
     'ActiveWorkbook.SaveAs txtFolder & Left(f, Len(f) - 3) & "xls",
     'FileFormat:=xlNormal, ConflictResolution:=xlLocalSessionChanges
     'ActiveWorkbook.Close False
    Next f
    Application.DisplayAlerts = True
 
End Sub

Function GetFolder(Optional sTitle As String = "Select Folder", _
  Optional sInitialFilename As String)
  Dim myFolder As String
  With Application.FileDialog(msoFileDialogFolderPicker)
    If sInitialFilename = "" Then sInitialFilename = "C:\" 
    If Right(sInitialFilename, 1) <> "\" Then
      sInitialFilename = sInitialFilename & "\"
    End If
    .InitialFileName = sInitialFilename
    .Title = "Greetings"
    If .Show = -1 Then
      sInitialFilename = .SelectedItems(1)
    End If
    If Right(sInitialFilename, 1) <> "\" Then
      GetFolder = sInitialFilename & "\"
    End If
  End With
End Function


Function GetFileList(FileSpec As String) As Variant
'   Returns an array of filenames that match FileSpec
'   If no matching files are found, it returns False

    Dim FileArray() As Variant
    Dim FileCount As Integer
    Dim FileName As String
    
    On Error GoTo NoFilesFound

    FileCount = 0
    FileName = Dir(FileSpec)
    If FileName = "" Then GoTo NoFilesFound
    
'   Loop until no more matching files are found
    Do While FileName <> ""
        FileCount = FileCount + 1
        ReDim Preserve FileArray(1 To FileCount)
        FileArray(FileCount) = FileName
        FileName = Dir()
    Loop
    GetFileList = FileArray
    Exit Function

'   Error handler
NoFilesFound:
    GetFileList = False
End Function