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True * 1 = -1
False * 1 = 0
True + 2 = 1
False + 2 = 2
응용::)
Public isWork As Boolean
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
isWork = Not isWork
Button1.Text = Choose(isWork + 2, "중 지", "시 작")
Work.Enabled = isWork
End Sub
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