Toolbar Combobox的正确语法

Question

我正在为NinjaTrader应用程序中的窗口编写一些工具栏代码。我的按钮运行得很好，但无法找出实现组合框的正确语法。这是按钮的语法;

声明变量-------

private System.Windows.Forms.ToolStrip strip = null;
private System.Windows.Forms.Control[] controls    = null;
private System.Windows.Forms.ToolStripButton btnHalt = null;

初始化按钮--------

ToolStripButton btnTemp = new System.Windows.Forms.ToolStripButton("temp");
boldFont = new Font("Arial", 8,FontStyle.Bold);
regularFont = new Font("Arial", 8);
btnTemp = null;

btnHalt = new System.Windows.Forms.ToolStripButton("btnHalt");
btnManual.Font = boldFont;
btnHalt.Font = regularFont;   
btnHalt.ForeColor = Color.White;
btnHalt.BackColor = Color.Red;   
btnHalt.Text = "Trading Off";
strip = (System.Windows.Forms.ToolStrip)controls[0];
strip.Items.Add(btnHalt);
btnHalt.Click += btnHalt_Click;

清理工具栏--------

public override void Dispose() 
{
    if (buttonsloaded==true)
    {
        strip.Items.Remove(btnHalt);
    }
}

On_Click事件代码---------

private void btnHalt_Click(object sender, EventArgs e)
{
    if (btnHalt.Text == "Trading Off")
    {
        btnHalt.Text = "Trading On";
        btnHalt.Font = regularFont;
        btnHalt.ForeColor = Color.White;
        btnHalt.BackColor = Color.Green;
    }
}

如果有人能告诉我组合框的正确语法，我会非常感激！

提前谢谢！