c#调用api实现模拟键盘输入举例(向QQ对话框发送字符串)

1、调用API模拟键盘事件usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Linq;usingSystem.Text;usingSystem.Windows.Forms;usingSystem.Diagnostics;usingMicrosoft.Win32;usingSystem.Runtime.InteropServices;/寇个必须要弓I用namespaceWindowsFormsApplicatio

2、n2publicpartialclassForm1:FormpublicForm1()InitializeComponent();/需要调用的API/找到窗口(进程名称可空，窗口名称)System.Runtime.InteropServices.DllImport("user32.dll",EntryPoint="FindWindow")publicstaticexternIntPtrFindWindow(stringlpClassName,stringlpWindowName);/把窗口放到最前面DllImport("USER32.DLL&q

3、uot;)publicstaticexternboolSetForegroundWindow(IntPtrhWnd);/模拟键盘事件DllImport("User32.dll")publicstaticexternvoidkeybd_event(BytebVk,BytebScan,Int32dwFlags,Int32dwExtraInfo);/释放按键的常量privateconstintKEYEVENTF_KEYUP=2;/发送消息DllImport("user32.dll")privatestaticexternintSendMessage(IntPt

4、rhWnd,intMsg,intwParam,intlParam);DllImport("user32.dll")/获取窗口大小return:MarshalAs(UnmanagedType.Bool)staticexternboolGetWindowRect(IntPtrhWnd,refRECTlpRect);StructLayout(LayoutKind.Sequential)/获取窗口坐标publicstructRECTpublicintLeft;最左坐标publicintTop;/最上坐标publicintRight;/最右坐标publicintBottom;/最下坐

5、标/显示窗口/DllImport("user32.dll")/privatestaticexternboolShowWindow(IntPtrhWnd,intnCmdShow);#regionSendMessage参数privateconstintWM_KEYDOWN=0X100;privateconstintWM_KEYUP=0X101;privateconstintWM_SYSCHAR=0X106;privateconstintWM_SYSKEYUP=0X105;privateconstintWM_SYSKEYDOWN=0X104;privateconstintWM_C

6、HAR=0X102;#endregion/鼠标事件privatereadonlyintMOUSEEVENTF_LEFTDOWN=0x2;privatereadonlyintMOUSEEVENTF_LEFTUP=0x4;DllImport("user32")publicstaticexternvoidmouse_event(intdwFlags,intdx,intdy,intdwData,intdwExtraInfo);/<summary>/发送一个字符串/</summary>/<paramname="myIntPtr">

7、;窗口句柄</param>/<paramname="Input">字符串</param>publicvoidInputStr(IntPtrk,stringInput)/不能发送汉字，只能发送键盘上有的内容也可以模拟shift+！等bytech=(ASCIIEncoding.ASCII.GetBytes(Input);for(inti=0;i<ch.Length;i+)SendMessage(k,WM_CHAR,chi,0);privatevoidbutton1_Click_1(objectsender,EventArgse)例如你打开的是QQ对话框，对方的名字叫宁波”IntPtrk=FindWindow(null,"大学梦")；if(k.ToString()!="0")SetForegroundWindow(k);/把找到的的对话框在最前面显示如果使用了这个方法stringa="himynameiszhanghongyuan"InputStr(k,a);SendMessage(k,WM_K