C#认证题4（使用标准Windons窗体控件）

1.   private void numericUpDown1_ValueChanged(object sender, EventArgs e)
           {
               trackBar1.Value = (int)numericUpDown1.Value;
           }

   Test4-3

private void vScrollBar1_ValueChanged(object sender, EventArgs e)
        {
            this.BackColor = Color.FromArgb(vScrollBar1.Value, vScrollBar2.Value, vScrollBar3.Value);
        }

        private void vScrollBar2_ValueChanged(object sender, EventArgs e)
        {
            this.BackColor = Color.FromArgb(vScrollBar1.Value, vScrollBar2.Value, vScrollBar3.Value);
        }

        private void vScrollBar3_ValueChanged(object sender, EventArgs e)
        {
            this.BackColor = Color.FromArgb(vScrollBar1.Value, vScrollBar2.Value, vScrollBar3.Value);
        }