Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        '6X4三角形
        For i = 1 To 6
            For j = 1 To 5
                TextBox1.Text = TextBox1.Text & "*"
            Next
            TextBox1.Text = TextBox1.Text & vbCrLf
        Next

    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        '數字三角形1
        For i = 1 To 6
            For j = 1 To i
                TextBox2.Text = TextBox2.Text & i
            Next
            TextBox2.Text = TextBox2.Text & vbCrLf
        Next
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click

        '六排星星三角形
        For i = 1 To 6
            For j = 1 To i
                TextBox3.Text = TextBox3.Text & "*"
            Next
            TextBox3.Text = TextBox3.Text & vbCrLf
        Next
    End Sub

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click

        '數字三角形2
        For i = 1 To 6
            For j = 1 To i
                TextBox4.Text = TextBox4.Text & j
            Next
            TextBox4.Text = TextBox4.Text & vbCrLf
        Next
    End Sub
End Class