Question

C#创建Windows窗体应用程序，在程序启动时将数据选项添加到组合框中，单击列表框中的任意一项后

Answer 1

Option Explicit

Private Sub Combo1_DblClick()
If Combo1.ListIndex < 0 Then Exit Sub
Combo1.RemoveItem Combo1.ListIndex
End Sub

Private Sub Form_Click()
List1_DblClick
End Sub

Private Sub List1_DblClick()
If List1.ListIndex < 0 Then Exit Sub
Combo1.AddItem List1.Text
End Sub