在窗体上画一个名称为Drive1的驱动器列表框,一个名称为Dir1的目录列表框,一个名称为File1的文件
能够正确实现上述功能的程序是
A.Private Sub Dir1_Change() Filc1.Path=Dir1.Path End Sub Private Sub Drive1_Change() Dir1.Path=Drive1.Drive Label1.Caption=File1.ListCount End Sub
B.Private Sub Dir1_Change() File1.Path=Dir1.Path End Sub Private Sub Drive1_Change() Dir1.Path=Drive1.Drive Label1.Caption=File1.List End Sub
C.Private Sub Dir1_Change() File1.Path=Dir1.Path Label1.Caption=File1.ListCount End Sub Private Sub Drive1_Change() Dir1.Path=Drive1.Drive Label1.Caption=File1.ListCount End Sub
D.Private Sub Dir1_Change() File1.Path=Dir1.Path Label1.Caption=File1.List End Sub Private Sub Drive1_Change() Dir1.Path=Drive1.Drive Label1.Caption=File1.List End Sub