Application 类

Application 类具有用于启动和停止应用程序和线程以及处理 Windows 消息的方法，如下所示：

• Run 在当前线程上启动应用程序消息循环，并可以选择使某窗体可见。

• Exit 或 ExitThread 停止消息循环。

• DoEvents 在您的程序处于某个循环中时处理消息。

• AddMessageFilter 向应用程序消息泵添加消息筛选器来监视 Windows 消息。

• IMessageFilter 使您可以阻止引发某事件或在调用某事件处理程序前执行特殊操作。

该类具有用于获取或设置当前线程的区域性信息的 CurrentCulture 和 CurrentInputLanguage 属性。

不能创建此类的实例。

Application.EnableVisualStyles();//Enables visual styles for the application
Application.SetCompatibleTextRenderingDefault(false);//If true, new controls that support UseCompatibleTextRendering use 
//the GDI+ based Graphics class for text rendering;
//if false, new controls use the GDI based TextRenderer class;In Visual C# 2005 or later, 
//a call to SetCompatibleTextRenderingDefault is automatically generated in the Program.cs file.
Application.Run(new mainFrm());

示例代码：

public class Form1 : Form
{
    [STAThread]
    public static void Main()
    {
        // Start the application.
        Application.Run(new Form1());
    }

    private Button button1;
    private ListBox listBox1;

    public Form1()
    {
        button1 = new Button();
        button1.Left = 200;
        button1.Text = "Exit";
        button1.Click += new EventHandler(button1_Click);

        listBox1 = new ListBox();
        this.Controls.Add(button1);
        this.Controls.Add(listBox1);
    }

    private void button1_Click(object sender, System.EventArgs e)
    {
        int count = 1;
        // Check to see whether the user wants to exit the application.
        // If not, add a number to the list box.
        while (MessageBox.Show("Exit application?", "", 
            MessageBoxButtons.YesNo)==DialogResult.No)
        {
            listBox1.Items.Add(count);
            count += 1;
        }

        // The user wants to exit the application. 
        // Close everything down.
        Application.Exit();
    }
}