Sub MoExcel()
Dim fileEx As String
fileEx = CurrentProject.Path & "\" & Me.TextBox1 & ".xls"
If (Dir(fileEx) <> "") Then
Shell "Excel.exe " & """" & fileEx & """", vbMaximizedFocus
Else
MsgBox "File " & fileEx & " khong ton tai",,"Thong Bao"
End If
End Sub