Các bạn xem giúp, vì mình không biết VBA:
Sub ExcelToCSV()
Dim MyPath As String
MyPath = "D:\"
MyFileName = ActiveSheet.Cells(1, 2)
ActiveSheet.Select
ActiveSheet.Copy
ActiveWorkbook.SaveAs _
Filename:=MyPath & MyFileName & ".csv", _
FileFormat:=xlCSV, CreateBackup:=False
ActiveWorkbook.Close True
End Sub