第一次接触win32api，刚开始的时候有点迷迷糊糊的。
Windows API 就是windows应用程序接口。 win api向上就是windows应用程序，向下就是windows操作系统核心。
刚开始的时候都是自己一步一步摸索，但是网上的东西都是一些
[DllImport("user32.dll")]
public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
诸如此类的，不知道怎么调用，这对于一个新手来说还是比较郁闷的。
今天花了2个小时总结了一些常用的操作窗口的win32 api的知识，当然不仅是只有函数的标明，包括怎么调用他，希望新手有帮助，我也是新手。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms; namespace WinformHandle
{
public partial class 句柄的获取 : Form
{
public 句柄的获取()
{
InitializeComponent();
} private void button1_Click(object sender, EventArgs e)
{
string str = string.Empty;
IntPtr i = FindWindow("MozillaWindowClass", null);
IntPtr i3 = FindWindow(null, "Teamviewer");
textBox1.AppendText("根据Teamviewer的title获取句柄：" + i3.ToString("x2") + "\r\n");
IntPtr i1 = FindWindow(null, "TeamViewer");
textBox1.AppendText("火狐浏览器的句柄:" + i.ToString("x2") + "\r\n");
textBox1.AppendText("Teamviewer的句柄:" + i1.ToString("x2") + "\r\n");
IntPtr i2 = FindWindowEx(i1, IntPtr.Zero, "Button", "远程控制");
StringBuilder sb = new StringBuilder();
GetWindowText(i1, sb, sb.Capacity);
textBox1.AppendText("TeamViewer的文本：" + sb.ToString() + "\r\n");
textBox1.AppendText("Teamviewer下的子窗体的句柄:" + i2.ToString("x2") + "\r\n");
List<WindowInfo> listInfo = GetAllDesktopWindows("MozillaWindowClass");
for (int s = ; s < listInfo.Count; s++)
{
textBox1.AppendText("List<WindowInfo>[" + s + "]" + "句柄：" + listInfo[s].hWnd.ToString("x2") + "类名：" + listInfo[s].szClassName + "文本：" + listInfo[s].szWindowName + "\r\n");
}
WindowInfo vsInfo = GetIntPtrByWindowClName("HwndWrapper[DefaultDomain;;ec23c78e-745d-424c-a8d8-d108ad24c70f]");
textBox1.AppendText("根据vs2013的类名获取qq窗体的信息：" + "句柄:" + vsInfo.hWnd.ToString("x2") + "文本:" + vsInfo.szWindowName + "类名:" + vsInfo.szClassName + "\r\n");
WindowInfo mailInfo= GetIntPtrByWindowTitle("Foxmail");
textBox1.AppendText("根据Foxmail的标题获取句柄信息："+"句柄："+mailInfo.hWnd.ToString("x2")+"文本："+mailInfo.szWindowName+"类名:"+mailInfo.szClassName+"\r\n");
//这一步将会打开i1的窗口
SetForegroundWindow(i1);
ShowWindow(i1, );
} public struct WindowInfo
{
public IntPtr hWnd;
public string szWindowName;
public string szClassName; }
/// <summary>
/// 根据类名获取窗口信息
/// </summary>
/// <param name="className"></param>
/// <param name="windowText"></param>
/// <returns></returns>
public static List<WindowInfo> GetAllDesktopWindows(string className = "", string windowText = "")
{
List<WindowInfo> wndList = new List<WindowInfo>();
EnumWindows(delegate(IntPtr hWnd, int lParam)
{
WindowInfo wnd = new WindowInfo();
StringBuilder sb = new StringBuilder(); wnd.hWnd = hWnd; GetWindowText(hWnd, sb, sb.Capacity);
wnd.szWindowName = sb.ToString(); GetClassName(hWnd, sb, sb.Capacity);
wnd.szClassName = sb.ToString(); if ((className == "" || wnd.szClassName == className)
&& (windowText == "" || wnd.szWindowName == windowText))
{
wndList.Add(wnd);
}
return true;
}, ); return wndList;
}
/// <summary>
/// 显示窗体
/// </summary>
/// <param name="hWnd">窗体句柄</param>
/// <param name="nCmdShow">指定的命令 0:关闭窗口 1:正常大小显示窗口 2:最小化窗口3:最大化窗口</param>
/// <returns></returns>
[DllImport("user32.dll")]
public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
public enum WindowShowStatus
{
/// <summary>
/// 隐藏窗口
/// </summary>
SW_HIDE = ,
/// <summary>
/// 最大化窗口
/// </summary>
SW_MAXIMIZE = ,
/// <summary>
/// 最小化窗口
/// </summary>
SW_MINIMIZE = ,
/// <summary>
/// 用原来的大小和位置显示一个窗口，同时令其进入活动状态
/// </summary>
SW_RESTORE = ,
/// <summary>
/// 用当前的大小和位置显示一个窗口，同时令其进入活动状态
/// </summary>
SW_SHOW = ,
/// <summary>
/// 最大化窗口，并将其激活
/// </summary>
SW_SHOWMAXIMIZED = ,
/// <summary>
/// 最小化窗口，并将其激活
/// </summary>
SW_SHOWMINIMIZED = ,
/// <summary>
/// 最小化一个窗口，同时不改变活动窗口
/// </summary>
SW_SHOWMINNOACTIVE = ,
/// <summary>
/// 用当前的大小和位置显示一个窗口，不改变活动窗口
/// </summary>
SW_SHOWNA = ,
/// <summary>
/// 用最近的大小和位置显示一个窗口，同时不改变活动窗口
/// </summary>
SW_SHOWNOACTIVATE = ,
/// <summary>
/// 用原来的大小和位置显示一个窗口，同时令其进入活动状态，与SW_RESTORE 相同
/// </summary>
SW_SHOWNORMAL = ,
/// <summary>
/// 关闭窗体
/// </summary>
WM_CLOSE = 0x10
}
/// <summary>
/// 设置系统的前台窗体
/// </summary>
/// <param name="hWnd">窗体句柄</param>
/// <returns></returns>
[DllImport("user32.dll")]
public static extern bool SetForegroundWindow(IntPtr hWnd);
[DllImport("user32.dll")]
public static extern int GetWindowText(IntPtr hWnd, StringBuilder lpWindowText, int nMaxCount);
[DllImport("user32.dll")]
public static extern void GetClassName(IntPtr hWnd, StringBuilder lpClassName, int nMaxCount); [DllImport("user32.dll")]
public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
/// <summary>
/// 获取子窗口句柄
/// </summary>
/// <param name="hwndParent">主窗体句柄</param>
/// <param name="hwndChildAfter">子窗体句柄</param>
/// <param name="lpszClass">搜索的类名</param>
/// <param name="lpszWindow"></param>
/// <returns></returns>
[DllImport("user32.dll")]//,EntryPoint="FindWindowEx"
public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, String lpszClass, String lpszWindow);
public delegate bool CallBack(IntPtr hwnd, int lParam);
[DllImport("user32.dll")]
public static extern int EnumWindows(CallBack x, int y);
/// <summary>
/// 功能：更具窗体类名获取窗体的信息
/// </summary>
/// <param name="strWinClassName"></param>
/// <returns></returns>
public static WindowInfo GetIntPtrByWindowClName(string strWinClassName)
{
WindowInfo windowInfo = new WindowInfo(); EnumWindows(delegate(IntPtr hWnd, int lParam)
{
WindowInfo wnd = new WindowInfo();
StringBuilder sb = new StringBuilder(); wnd.hWnd = hWnd; GetWindowText(hWnd, sb, sb.Capacity);
wnd.szWindowName = sb.ToString(); GetClassName(hWnd, sb, sb.Capacity);
wnd.szClassName = sb.ToString(); if (wnd.szClassName == strWinClassName)
{
windowInfo = wnd;
}
return true;
}, ); return windowInfo;
}
/// <summary>
/// 功能：更具窗体标题获取窗体的信息
/// </summary>
/// <param name="strWinClassName"></param>
/// <returns></returns>
public static WindowInfo GetIntPtrByWindowTitle(string strWinHeadName)
{
WindowInfo windowInfo = new WindowInfo(); EnumWindows(delegate(IntPtr hWnd, int lParam)
{
WindowInfo wnd = new WindowInfo();
StringBuilder sb = new StringBuilder(); wnd.hWnd = hWnd; GetWindowText(hWnd, sb, sb.Capacity);
wnd.szWindowName = sb.ToString(); GetClassName(hWnd, sb, sb.Capacity);
wnd.szClassName = sb.ToString(); if (wnd.szWindowName == strWinHeadName)
{
windowInfo = wnd;
}
return true;
}, ); return windowInfo;
}
/// <summary>
/// 指定句柄的窗口发送消息
/// </summary>
/// <param name="hWnd">接收消息窗体的句柄</param>
/// <param name="Msg">消息标示符</param>
/// <param name="wParam">消息</param>
/// <param name="lParam"></param>
/// <returns></returns>
[DllImport("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, string lParam); }
}