//根据窗口类型或者窗口标题获取窗口句柄

[DllImport("User32.dll", EntryPoint = "FindWindow")]

private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

//根据父窗口句柄、子窗口句柄、窗口类型、窗口标题 获取句柄

[DllImport("user32.dll", EntryPoint = "FindWindowEx", SetLastError = true)]

private static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);

/// <summary>

/// 向指定句柄的窗口发送消息

/// </summary>

/// <param name="hWnd">窗口句柄</param>

/// <param name="Msg">消息类型</param>

/// <param name="wParam">消息1</param>

/// <param name="lParam">消息2</param>

/// <returns></returns>

[DllImport("User32.dll", EntryPoint = "SendMessage")]

private static extern int SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, string lParam);

//将指定句柄的窗口置顶

[DllImport("User32.dll", EntryPoint = "SetForegroundWindow")]

private static extern bool SetForegroundWindow(IntPtr hWnd);

const int WM_SETTEXT = 0x000C; //为指定句柄的窗口设置文本信息

const int WM_CLICK = 0x00F5; //为指定句柄的窗口发送点击事件

//根据窗口名称获取出啊港口句柄

IntPtr IPWnd = new IntPtr(0);

IPWnd = FindWindow(null, "运维客户端");

if (IPWnd != IntPtr.Zero)

{

    //根据找到的窗口  找到里面的输入框

    IntPtr txtWnd = new IntPtr(0);

    txtWnd = FindWindowEx(IPWnd, IntPtr.Zero, "Edit", null);

    if (txtWnd != IntPtr.Zero)

    {

        //如果找到了，就往里面输入文本信息

        SendMessage(txtWnd, WM_SETTEXT, IntPtr.Zero, "文本信息");

    }

    //对于存在相同类型的控件,寻找起来是相对麻烦一些的，因为他们没有独特的标志，但是有独自的index

    //如该例中的Button ,我们可以通过index获取想要的控件句柄

    //但是因为该按钮是第一个，所以默认找到的就是它，可以不做特殊处理

    //如果要按照INDEX获取 可以使用下面的 FindWindowByIndex 方法

    IntPtr buttonQRWnd = new IntPtr(0);

    buttonQRWnd = FindWindowEx(IPWnd, IntPtr.Zero, null, null);

    if (buttonQRWnd != IntPtr.Zero)

    {

        //将窗体置顶 点击事件要确保被点击的单位在最顶层，要不然点不到

        SetForegroundWindow(IPWnd);

        //在任何操作之前最好等待一下，在这里主要避免置顶操作还未完成就触发点击事件，从而导致点击失效

        Thread.Sleep(150);

        //给按钮发送点击消息

        SendMessage(buttonQRWnd, WM_CLICK, IntPtr.Zero, "");

    }

}

static IntPtr FindWindowByIndex(IntPtr hWndParent, int index)

{

    if (index == 0)

        return hWndParent;

    else

    {

        int ct = 0;

        IntPtr result = IntPtr.Zero;

        do

        {

            result = FindWindowEx(hWndParent, result, "Button", null);

            if (result != IntPtr.Zero)

                ++ct;

        }

        while (ct < index && result != IntPtr.Zero);

        return result;

    }

}

//获取主窗口句柄

IntPtr LoginWnd = new IntPtr(0);

LoginWnd = FindWindow("OMClientPlus", null);

if (LoginWnd != IntPtr.Zero)

{

    //下面的操作都是为了找到最里面的控件的句柄

    //也就是sehlln内包含了shellView，shellView内又包含了ies ，最终ies才是承载html的容器控件

    //视情况按照Spy++中显示的控件包含关系确认最终的控件信息

    IntPtr shell = FindWindowEx(LoginWnd,IntPtr.Zero, "Shell Embedding",null);

    Thread.Sleep(50);

    IntPtr shellview = FindWindowEx(shell, IntPtr.Zero, "Shell DocObject View", null);

    Thread.Sleep(50);

    IntPtr ies = FindWindowEx(shellview, IntPtr.Zero, "Internet Explorer_Server", null);

    Thread.Sleep(50);

    //获取容器控件中的HtmlDoucument

    mshtml.IHTMLDocument2 id = GetHtmlDocument(ies.ToInt32());

    //获取到所有的Input类型的组件

    mshtml.IHTMLElementCollection inputs;

    inputs = (mshtml.IHTMLElementCollection)id.all.tags("input");

    //找到用户名

    mshtml.IHTMLElement accountElement = (mshtml.IHTMLElement)inputs.item("u",0);

    mshtml.IHTMLInputElement accountInputElement = (mshtml.IHTMLInputElement)accountElement;

    accountInputElement.value = account;

    Thread.Sleep(150);

    //找到密码

    mshtml.IHTMLElement passwordElement = (mshtml.IHTMLElement)inputs.item("p", 0);

    mshtml.IHTMLInputElement passwordInputElement = (mshtml.IHTMLInputElement)passwordElement;

    passwordInputElement.value = password;

    Thread.Sleep(150);

    //点击确认按钮

    mshtml.IHTMLElement login = (mshtml.IHTMLElement)inputs.item("Login", 0);

    login.click();

}

public mshtml.IHTMLDocument2 GetHtmlDocument(int hwnd)

 {

     System.Object domObject = new System.Object();

     int tempInt = 0;

     System.Guid guidIEDocument2 = new Guid();

     int WM_Html_GETOBJECT = Win32API.RegisterWindowMessage("WM_Html_GETOBJECT");//定义一个新的窗口消息

     int W = Win32API.SendMessage(hwnd, WM_Html_GETOBJECT, 0, ref tempInt);//注:第二个参数是RegisterWindowMessage函数的返回值

     int lreturn = Win32API.ObjectfromLresult(W, ref guidIEDocument2, 0, ref domObject);

     mshtml.IHTMLDocument2 doc = (mshtml.IHTMLDocument2)domObject;

     return doc;

 }