Public Class Form1
Private Sub DateTimePicker1_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DateTimePicker1.ValueChanged
XJUMLAH.Text = Microsoft.VisualBasic.Day(DateAdd("d", -1, DateSerial(Year(DateTimePicker1.Value), Month(DateTimePicker1.Value) + 1, 1)))
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
End Class

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