回答編集履歴
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修正
answer
CHANGED
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@@ -11,6 +11,13 @@
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Imports System.IO
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Public Class Form1
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Protected Overrides Sub OnLoad(e As EventArgs)
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MyBase.OnLoad(e)
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Timer1.Interval = 1000
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Timer1.Start()
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End Sub
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Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
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Debug.WriteLine($"{Now} {File.Exists("A.txt")}")
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End Sub
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