調色盤ColorV3

Public Class Form1
    Dim R As Integer
    Dim G As Integer
    Dim B As Integer
    Private Sub TrackBar1_Scroll(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TrackBar1.Scroll
        PictureBox4.BackColor = Color.FromArgb(TrackBar1.Value, TrackBar2.Value, TrackBar3.Value)
        Label1.Text = TrackBar1.Value
        PictureBox1.BackColor = Color.FromArgb(TrackBar1.Value, 0, 0)
    End Sub

    Private Sub TrackBar2_Scroll(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TrackBar2.Scroll
        PictureBox4.BackColor = Color.FromArgb(TrackBar1.Value, TrackBar2.Value, TrackBar3.Value)
        Label2.Text = TrackBar2.Value
        PictureBox2.BackColor = Color.FromArgb(0, TrackBar2.Value, 0)
    End Sub

    Private Sub TrackBar3_Scroll(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TrackBar3.Scroll
        PictureBox4.BackColor = Color.FromArgb(TrackBar1.Value, TrackBar2.Value, TrackBar3.Value)
        Label3.Text = TrackBar3.Value
        PictureBox3.BackColor = Color.FromArgb(0, 0, TrackBar3.Value)
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        R = val(InputBox("請輸入紅色", "紅", 128))
        G = val(InputBox("請輸入綠色", "綠", 128))
        B = val(InputBox("請輸入藍色", "藍", 128))
        TrackBar1.Value = R
        TrackBar2.Value = G
        TrackBar3.Value = B
        PictureBox4.BackColor = Color.FromArgb(R, G, B)
        Label1.Text = R
        PictureBox1.BackColor = Color.FromArgb(R, 0, 0)
        Label2.Text = G
        PictureBox2.BackColor = Color.FromArgb(0, G, 0)
        Label3.Text = B
        PictureBox3.BackColor = Color.FromArgb(0, 0, B)
    End Sub
End Class