DATETIMEPICKER Toolbox DateTimePicker Button1: text=HIỆN NGÀY SINH CODE ublic Class Form1 Private Sub DateTimePicker1_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DateTimePicker1.ValueChanged End Sub Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load End Sub Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click MsgBox("Ngày sinh bạn là: " & DateTimePicker1.Text) MsgBox("Ngày năm: " & DateTimePicker1.Value.DayOfYear.ToString) MsgBox("Hôm ngày: " & Now.ToString) End Sub End Class