sub MergingExtend()
rem ----------------------------------------------------------------------
  Dim oDoc As Object, oSheet As Object, oCell As Object
  oDoc=ThisComponent
  oSheet=oDoc.Sheets.getByName("Control")
  oCell=oSheet.getCellByposition(4,5) 'E6
  print oCell.getvalue()

rem define variables
dim document   as object
dim dispatcher as object
'dim count%
'count = MaxRowCount()
rem ----------------------------------------------------------------------
rem get access to the document
document   = ThisComponent.CurrentController.Frame
dispatcher = createUnoService("com.sun.star.frame.DispatchHelper")

rem ----------------------------------------------------------------------
dim args1(0) as new com.sun.star.beans.PropertyValue
args1(0).Name = "ToPoint"
args1(0).Value = "$A$1:$W$oCell.getValue()"

dispatcher.executeDispatch(document, ".uno:GoToCell", "", 0, args1())

rem ----------------------------------------------------------------------
dim args2(0) as new com.sun.star.beans.PropertyValue
args2(0).Name = "EndCell"
args2(0).Value = "$W$"& oCell.getValue() &""

dispatcher.executeDispatch(document, ".uno:AutoFill", "", 0, args2())

rem ----------------------------------------------------------------------
dim args3(0) as new com.sun.star.beans.PropertyValue
args3(0).Name = "ToPoint"
args3(0).Value = "$A$1:$W$oCell.getValue()"

dispatcher.executeDispatch(document, ".uno:GoToCell", "", 0, args3())

end sub

Function MaxRowCount() As Integer
  Dim oDoc As Object, oSheet As Object, oCell As Object
  oDoc=ThisComponent
  oSheet=oDoc.Sheets.getByName("Control")
  oCell=oSheet.getCellByposition(4,5) 'E6
  MaxRowCount() = oCell.getValue()
  'print MaxRowCount
End Function