在窗体上画一个驱动器列表框、一个目录列表框和一个文件列表框,其名称分别为 Drivel、Dirl和Filel。
A.Dirvel.Drive=Dirl.Path
B.Dirl.Path=Drivel.Drive
C.Dirl.Path=Filel.Path
D.Filel.Path=Dirl.Path
A.Dirvel.Drive=Dirl.Path
B.Dirl.Path=Drivel.Drive
C.Dirl.Path=Filel.Path
D.Filel.Path=Dirl.Path
A.Drivel change
B.Drive1_Click
C.Dirl_Click
D.Dirl_Change
A.Drive1_Change
B.Drive1_Click
C.Dir1_Click
D.Dir1_Change
A.Drive1_Change
B.Drive1_Click
C.Dir1_Click
D.Dir1_Change
A.Drivel_Change
B.Drivel_Click
C.Dirl_Click
D.Dirl_Change
A.Drive1_Change
B.Drive1_Click
C.Dir1_Click
D.Dir1_Change
A.Dirve1.Drive=Dir1.Path
B.Dir1.Path=Drive1.Drive
C.Dir1.Path=File1.Path
D.File1.Path=Dir1.Path
A.Dirve1.Drive=Dir1.Path
B.Dir1.Path=Drive1.Drive
C.Dir1.Path=Filel.Path
D.File1.Path=Dir1.Path
A.Dirve1. Drive=Dir1. Path
B.Dit1. Path=Drive1. Drive
C.Dir1. Path=File1. Path
D.File1. Path=Dir1. Path
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