【转】用C#调用Windows API向指定窗口发送

时间:2021-07-16 10:51:47

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;

[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 static 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 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 = ;
private const int SW_RESTORE = ;
private const int SW_SHOWNOACTIVATE = ;
//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

IntPtr 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, 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 hWnd, [MarshalAs(UnmanagedType.LPWStr)]StringBuilder lpString, int nMaxCount);

2 调用EnumWindows遍历窗口

CallBack myCallBack = new CallBack(Recall);
EnumWindows(myCallBack, );

3 回调方法Recall

public bool Recall(int hwnd, int lParam)
{
 StringBuilder sb = new StringBuilder();
 IntPtr PW = new IntPtr(hwnd);  GetWindowTextW(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") >= && strClass.IndexOf("类名关键字") >= )
 {
  return false; //返回false中止EnumWindows遍历
 }
 else
 {
  return true; //返回true继续EnumWindows遍历
 }
}

3)、打开窗口得到句柄
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");
SetActiveWindow(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ID
SendMessage(myIntPtr, WM_SYSKEYDOWN, 0X09, ); //输入TAB(0x09)
SendMessage(myIntPtr, WM_SYSKEYUP, 0X09, );
InputStr(myIntPtr, _GamePass); //输入游戏密码
SendMessage(myIntPtr, WM_SYSKEYDOWN, 0X0D, ); //输入ENTER(0x0d)
SendMessage(myIntPtr, WM_SYSKEYUP, 0X0D, ); /// <summary>
/// 发送一个字符串
/// </summary>
/// <param name="myIntPtr">窗口句柄</param>
/// <param name="Input">字符串</param>
public void InputStr(IntPtr myIntPtr, string Input)
{
 byte[] ch = (ASCIIEncoding.ASCII.GetBytes(Input));
 for (int i = ; i < ch.Length; i++)
 {
  SendMessage(PW, WM_CHAR, ch, );
 }
}

2 利用鼠标和键盘模拟向窗口发送数据

SetWindowPos(PW, (IntPtr)(-), , , , , 0x0040 | 0x0001); //设置窗口位置
SetCursorPos(, ); //设置鼠标位置
mouse_event(0x0002, , , , ); //模拟鼠标按下操作
mouse_event(0x0004, , , , ); //模拟鼠标放开操作
SendKeys.Send(_GameID); //模拟键盘输入游戏ID
SendKeys.Send("{TAB}"); //模拟键盘输入TAB
SendKeys.Send(_GamePass); //模拟键盘输入游戏密码
SendKeys.Send("{ENTER}"); //模拟键盘输入ENTER

另:上面还提到了keybd_event方法,用法和mouse_event方法类似,作用和SendKeys.Send一样。

【转】http://www.51testing.com/html/61/175761-227073.html