用C#调用Windows API实现自动登录

1、用C#调用Windows API实现自动登录c#问题 2009-07-19 20:50:09 阅读152 评论1 字号：大中小订阅 设计初衷：公司为了安全性考虑，不让密码被太多人知道，所以想实现一个自动登录的模块。设计思想： 主要是通过调用Windows API中的一些方法，找到目标窗口和进程之后把保存在数据库中的用户名密码自动填入输入框中，并登录。设计步骤：一、调用Windows API。C#下调用Windows API方法如下：1、引入命名空间：using System.Runtime.InteropServices;2、引用需要使用的方法，格式：DllImport(DLL文件)方法的声明

2、;DllImport(user32.dll)private static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);DllImport(user32.dll)private static extern bool SetForegroundWindow(IntPtr hWnd);DllImport(user32.dll)private static extern IntPtr FindWindow(string lpClassName,string lpWindowName);DllImport(user32.dll)private st

3、atic extern int SendMessage(IntPtr hWnd,int Msg,int wParam,int lParam);DllImport(user32.dll)private static extern bool SetCursorPos(int X, int Y);DllImport(user32.dll)private static extern void mouse_event(int dwFlags, int dx, int dy, int dwData, int dwExtraInfo);DllImport(user32.dll)private static

4、extern void keybd_event(byte bVk, byte bScan, uint dwFlags, uint dwExtraInfo);DllImport(user32.dll)private static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndlnsertAfter, int X, int Y, int cx, int cy, uint Flags); /ShowWindow参数private const int SW_SHOWNORMAL = 1;private const int SW_RESTORE = 9

5、;private const int SW_SHOWNOACTIVATE = 4;/SendMessage参数private const int WM_KEYDOWN = 0X100;private const int WM_KEYUP = 0X101;private const int WM_SYSCHAR = 0X106;private const int WM_SYSKEYUP = 0X105;private const int WM_SYSKEYDOWN = 0X104;private const int WM_CHAR = 0X102;二、找到目标窗口1)、根据窗口的标题得到句柄In

6、tPtr myIntPtr = FindWindow(null,窗口名); /null为类名，可以用Spy+得到，也可以为空ShowWindow(myIntPtr, SW_RESTORE); /将窗口还原SetForegroundWindow(myIntPtr); /如果没有ShowWindow，此方法不能设置最小化的窗口2)、遍历所有窗口得到句柄1 定义委托方法CallBack，枚举窗口API（EnumWindows），得到窗口名API（GetWindowTextW）和得到窗口类名API（GetClassNameW）public delegate bool CallBack(int hwnd

7、, int lParam);DllImport(user32)public static extern int EnumWindows(CallBack x, int y);DllImport(user32.dll)private static extern int GetWindowTextW(IntPtr hWnd, MarshalAs(UnmanagedType.LPWStr)StringBuilder lpString, int nMaxCount);DllImport(user32.dll)private static extern int GetClassNameW(IntPtr

8、hWnd, MarshalAs(UnmanagedType.LPWStr)StringBuilder lpString, int nMaxCount);2 调用EnumWindows遍历窗口CallBack myCallBack = new CallBack(Recall);EnumWindows(myCallBack, 0);3 回调方法Recallpublic bool Recall(int hwnd, int lParam)StringBuilder sb = new StringBuilder(256);IntPtr PW = new IntPtr(hwnd);GetWindowTex

9、tW(PW,sb,sb.Capacity); /得到窗口名并保存在strName中string strName = sb.ToString();GetClassNameW(PW,sb,sb.Capacity); /得到窗口类名并保存在strClass中string strClass = sb.ToString();if (strName.IndexOf(窗口名关键字) = 0 & strClass.IndexOf(类名关键字) = 0)return false; /返回false中止EnumWindows遍历elsereturn true; /返回true继续EnumWindows遍历3)、打

10、开窗口得到句柄1 定义设置活动窗口API（SetActiveWindow），设置前台窗口API（SetForegroundWindow）DllImport(user32.dll)static extern IntPtr SetActiveWindow(IntPtr hWnd);DllImport(user32.dll)return: MarshalAs(UnmanagedType.Bool)static extern bool SetForegroundWindow(IntPtr hWnd);2 打开窗口Process proc = Process.Start(目标程序路径);SetActiv

11、eWindow(proc.MainWindowHandle);SetForegroundWindow(proc.MainWindowHandle);三、向指定的窗口输入数据1 利用发送消息API（SendMessage）向窗口发送数据InputStr(myIntPtr, _GameID); /输入游戏IDSendMessage(myIntPtr, WM_SYSKEYDOWN, 0X09, 0); /输入TAB（0x09）SendMessage(myIntPtr, WM_SYSKEYUP, 0X09, 0);InputStr(myIntPtr, _GamePass); /输入游戏密码SendMe

12、ssage(myIntPtr, WM_SYSKEYDOWN, 0X0D, 0); /输入ENTER（0x0d）SendMessage(myIntPtr, WM_SYSKEYUP, 0X0D, 0);/ / 发送一个字符串/ / 窗口句柄/ 字符串public void InputStr(IntPtr myIntPtr, string Input)byte ch = (ASCIIEncoding.ASCII.GetBytes(Input);for (int i = 0; i ch.Length; i+) SendMessage(PW, WM_CHAR, ch, 0);2 利用鼠标和键盘模拟向窗口发送数据SetWindowPos(PW, (IntPtr)(-1), 0, 0, 0, 0, 0x0040 | 0x0001); /设置窗口位置SetCursorPos(476, 177); /设置鼠标位置mouse_event(0x0002, 0, 0