user32的使用

通过代码查询特定的窗口，并在文本框中输入文字然后单击"OK"按钮
需要查找的Dialog
使用Spy++查看窗口信息
通过代码实现功能
     class Program

     {

         //define method

         /// <summary>

         /// 查找顶级窗口,如果有指定的类名和窗口的名字则表示成功返回一个窗口的句柄。否则返回零。

         /// </summary>

         /// <param name="lpClassName">lpClassName参数指向类名</param>

         /// <param name="lpWindowName">lpWindowName指向窗口名</param>

         /// <returns></returns>

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

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

         /// <summary>

         /// 在窗口列表中寻找与指定条件相符的第一个子窗口

         /// </summary>

         /// <param name="hwndParent">父窗口句柄</param>

         /// <param name="hwndChildAfter">子窗口句柄</param>

         /// <param name="lpszClass">窗口类名</param>

         /// <param name="lpszWindow">窗口名</param>

         /// <returns></returns>

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

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

         /// <summary>

         /// 该函数将指定的消息发送到一个或多个窗口

         /// </summary>

         /// <param name="hWnd">接收消息的窗口句柄</param>

         /// <param name="Msg">指定被发送的消息类型</param>

         /// <param name="wParam"></param>

         /// <param name="lParam">发送的消息</param>

         /// <returns></returns>

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

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

         //define message type

         private const int WM_GETTEXT = 0x000D;

         private const int WM_SETTEXT = 0x000C;

         private const int WM_CLICK = 0x00F5;

         public static void Main()

         {

             SearchWindow();

         }

         private static void SearchWindow()

         {

             //主窗口类型名及窗口名

             string lpszParentClassName = "";

             string lpszParentWindowName = "Print To File";

             //主窗口句柄

             IntPtr ParenthWnd = new IntPtr();

             //子窗口句柄

             IntPtr EdithWnd = new IntPtr();

             //查到主窗体，得到整个窗体

             ParenthWnd = FindWindow(null, lpszParentWindowName);

             //判断这个窗体是否有效

             if (!ParenthWnd.Equals(IntPtr.Zero))

             {

                 //得到FileName这个子窗体，并设置其内容

                 EdithWnd = FindWindowEx(ParenthWnd, EdithWnd, "Edit", "");

                 if (!EdithWnd.Equals(IntPtr.Zero))

                 {

                     //调用SendMessage方法设置其内容

                     SendMessage(EdithWnd, WM_SETTEXT, (IntPtr), "你需要输入的文本");

                 }

                 //得到OK这个子窗体，并设置其内容

                 EdithWnd = FindWindowEx(ParenthWnd, EdithWnd, "Button", "OK");

                 if (!EdithWnd.Equals(IntPtr.Zero))

                 {

                     SendMessage(EdithWnd, WM_CLICK, (IntPtr), "");

                 }

             }

         }

     }
巴特西

user32的使用

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