在WinForm中也可以调用Windows API，这里的简单例子，只是做一个简单的演示：
方法/步骤
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace WinAPISample
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void btnClear_Click(object sender, EventArgs e)
{
SHEmptyRecycleBin(Form.ActiveForm.Handle, "", 0x00000000);
}
private void btnMax_Click(object sender, EventArgs e)
{
ShowWindow(Form.ActiveForm.Handle, 3);
}
private void btnMin_Click(object sender, EventArgs e)
{
ShowWindow(Form.ActiveForm.Handle, 2);
}
private void btnNormal_Click(object sender, EventArgs e)
{
ShowWindow(Form.ActiveForm.Handle, 1);
}
private void btnBrowser_Click(object sender, EventArgs e)
{
ShellExecute(Form.ActiveForm.Handle, "Open", this.tbURL.Text, "", "", 1);
}
/// <summary>
/// 清空回收站
/// </summary>
[DllImport("shell32.dll", EntryPoint = "SHEmptyRecycleBin", CharSet = CharSet.Auto)]
public static extern long SHEmptyRecycleBin(IntPtr hwnd, string pszRootPath, long dwFlags);
/// <summary>
/// 打开浏览器
/// </summary>
[DllImport("shell32.dll", EntryPoint = "ShellExecute", CharSet = CharSet.Auto)]
public static extern int ShellExecute(IntPtr hwnd, string lpOperation, string lpFile,string lpParameters, string lpDirectory, int nShowCmd);
/// <summary>
/// 最大化窗口，最小窗口，正常大小窗口
/// </summary>
[DllImport("user32.dll", EntryPoint = "ShowWindow", CharSet = CharSet.Auto)]
public static extern int ShowWindow(IntPtr hwnd, int nCmdShow);
}
}
