在窗体上画一个名称为Text1的文本框，并编写如下程序：
Private Sub Form_Load()
Show
Text1.Text = ""
Text1.SetFocus
End Sub

Private Sub Form_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)
Print "程序设计"
End Sub

Private Sub Text1_KeyDown(KeyCode As Integer, Shift As Integer)
Print "Visual Basic";
End Sub
程序运行后，如果按"A"键，然后单击窗体，则在窗体上显示的内容是( )
A）Visual Basic B）程序设计
C）A程序设计 D）Visual Basic程序设计