C#中用WinAPI调用外部程序~~~

在使用别人的程序时,我们常发现一些好的功能,想通过自己的程序来重复调用。可偏偏这个程序没有留可编程接口,无法通过API、DLL、COM等方式实现 调用。早些年与同仁们讨论时,常对此深表遗憾。最近,通过研究Windows API的使用方法,终于从理论上解决了这一问题,即可通WinAPISendMessageEnumChildWindows等,从模拟操作的角度来调用指定程序的指定功能。

我们知道,Windows是消息驱动的,即Windows窗口、控件的任何操作,都是通过消息事件来完成的。从理论上讲,在我们自己的程序中,只要能准确地找到相应功能所在的窗口或控件的句柄Handle, 发出相应的消息,即可完成相应任务。从这个层面上,这种技术可以应用在所有windows程序上。只是这种技术的处理,需要非常细心。因为在实际应用中, 从某一个程序中找到相应的控件(包括Parent/Child/Next等)还是比较麻琐的,一不小心,调用的功能就实法实现,还有可能导致程序甚至系统 的崩溃。所以,这种技术的关键在于两个地方:一是找准句柄,二是找对消息。

推荐分析一个窗体(控件)的句柄或消息的工具:SPY++,这在Visual Studio Tools中有,操作起来很简单。
单击在新窗口中打开图片,Ctrl+滚轮缩放图片


C#中实现外部程序调用,可以通过封装User32.dllsendmessage等函数来实现。我已将常用的功能封装成一个类:
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using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace MuliCall
{
class WinApi
{
#region 宏定义


public const int WM_KEYDOWN = 0x100;
public const int WM_KEYUP = 0x101;
public const int VK_CONTROL = 0x11;
public const int VK_F5 = 0x74;
public const int KEYEVENTF_KEYUP = 0x2;
public const int VK_MENU = 0x12;
public const int WM_SETTEXT = 0xC;
public const int WM_CLEAR = 0x303;
public const int BN_CLICKED = 0;
public const int WM_LBUTTONDOWN = 0x201;
public const int WM_LBUTTONUP = 0x202;
public const int WM_CLOSE = 0x10;
public const int WM_COMMAND = 0x111;
public const int WM_SYSKEYDOWN = 0x104;

#endregion


public delegate bool EnumChildWindowsProc(IntPtr hwnd, int lParam);

#region WinAPI定义


[DllImport("User32.dll", EntryPoint = "SendMessage")]
public static extern int SendMessage(
int hWnd, // handle to destination window

int Msg, // message

int wParam, // first message parameter

int lParam // second message parameter
);
[DllImport("User32.dll", EntryPoint = "SendMessage")]
public static extern int SendTxtMessage(
int hWnd, // handle to destination window

int Msg, // message

int wParam, // first message parameter

char[] lParam
// int lParam // second message parameter

);
[DllImport("user32.dll", EntryPoint = "PostMessage")]
public static extern int PostMessage(
int hwnd,
int wMsg,
int wParam,
int lParam
);

[DllImport("user32.dll", EntryPoint = "FindWindow")]
public static extern int FindWindow(
string lpClassName,
string lpWindowName
);
[DllImport("user32.dll", EntryPoint = "FindWindowEx")]
public static extern int FindWindowEx(
int hwndParent,
int hwndChildAfter,
string lpszClass,
string lpszWindow
);
[DllImport("user32.dll", EntryPoint = "EnumChildWindows")]
public static extern int EnumChildWindows(
int hWndParent,
int lpEnumFunc,
int lParam
);

[DllImport("user32.dll", EntryPoint = "EnumChildWindows")]
public static extern int EnumChildWindows(
int hWndParent,
EnumChildWindowsProc lpEnumFunc,
int lParam
);

[DllImport("user32.dll", EntryPoint = "SetFocus")]
public static extern int SetFocus(
int hWnd
);

[DllImport("user32.dll", EntryPoint = "SetWindowText")]
public static extern int SetWindowText(
int hwnd,
string lpString
);

[DllImport("user32.dll", EntryPoint = "keybd_event")]
public static extern void keybd_event(
byte bVk,
byte bScan,
int dwFlags,
int dwExtraInfo
);

[DllImport("user32.dll", EntryPoint = "SetForegroundWindow")]
public static extern int SetForegroundWindow(
int hwnd
);

[DllImport("user32.dll", EntryPoint = "GetClassName")]
public static extern int GetClassName(
IntPtr hwnd,
StringBuilder lpClassName,
int nMaxCount
);
[DllImport("user32.dll", EntryPoint = "GetWindowText")]
public static extern int GetWindowText(
IntPtr hwnd,
StringBuilder lpString,
int cch
);

#endregion


//综合处理全局HWD

private static int CurrnetFormHandle = 0;
//综合处理函数


public static void SetCurrnetFormHandle(string strWindow)
{
SetCurrnetFormHandle(null, strWindow, false);
}
public static void SetCurrnetFormHandle(string strClass, string strWindow, bool beForeground)
{
CurrnetFormHandle = FindWindow(strClass, strWindow);
if (beForeground)
SetForegroundWindow(CurrnetFormHandle);
}
public static void SetCurrnetFormHandle(int hwd, bool beForeground)
{
CurrnetFormHandle = hwd;
if (beForeground)
SetForegroundWindow(CurrnetFormHandle);
}

public static void SetCurrnetFormHandle(int hwd)
{
CurrnetFormHandle = hwd;
}
public static int GetCurrentFormHandle()
{
return CurrnetFormHandle;
}

//模拟单击按钮

public static void ClickButton(string strWindow)
{
ClickButton("Button", strWindow);
}

public static void ClickButton(string strClass, string strWindow)
{
ClickButton(CurrnetFormHandle, 0, strClass, strWindow);
}

public static void ClickButton(int hwdParent, int hwndChildAfter, string strClass, string strWindow)
{
int hwdButton = FindWindowEx(hwdParent, hwndChildAfter, strClass, strWindow);
SendMessage(hwdButton, WM_LBUTTONDOWN, 0, 0);
SendMessage(hwdButton, WM_LBUTTONUP, 0, 0);
}

//修改文本框内容

public static void SetWindowsText(string Parnet_strClass, string Parnet_strText, string strClass, string strText)
{
int hwdParent = FindWindowEx(CurrnetFormHandle, 0, Parnet_strClass, Parnet_strText);

//停止 ThunderRT6OptionButton

int bntHwd = FindWindowEx(hwdParent, 0, "ThunderRT6OptionButton", "停止");

int hwdText = FindWindowEx(hwdParent, bntHwd, strClass, null); //ThunderRT6TextBox

SendTxtMessage(hwdText, WM_SETTEXT, 0, strText.ToCharArray());
}
public static void SetWindowsText(string strClass, string strText)
{
SetWindowsText(strClass, null, strText);
}
public static void SetWindowsText(string strClass, string strWindow, string strText)
{
SetWindowsText(CurrnetFormHandle, 0, strClass, strWindow, strText);
}
public static void SetWindowsText(int hwdParent, int hwndChildAfter, string strClass, string strWindow, string strText)
{
int hwdText = FindWindowEx(hwdParent, hwndChildAfter, strClass, strText);
SendTxtMessage(hwdText, WM_SETTEXT, 0, strText.ToCharArray());
}

//搜索子窗体

public static void SearchChild(string strWindow)
{
EnumChildWindowsProc myEnumChild = new EnumChildWindowsProc(EumWinChiPro);
try
{
EnumChildWindows(CurrnetFormHandle, myEnumChild, 0);
}
catch (Exception ex)
{
; // MessageBox.Show(ex.Message + "\r\n" + ex.Source + "\r\n\r\n" + ex.StackTrace.ToString());

}

}

public static bool EumWinChiPro(IntPtr hWnd, int lParam)
{
StringBuilder s = new StringBuilder(1256);
GetClassName(hWnd, s, 1257);
string ss = s.ToString();
if (ss == null)
ss = "";
ss = ss.Trim();
// MessageBox.Show(ss);

// ThunderRT6TextBox


StringBuilder s2 = new StringBuilder(1256);
GetWindowText(hWnd, s2, 1257);
ss = s2.ToString();
return true;
}
}
}

使用这个类,在自己的程序中,比较方便地实现外部程序的调用。
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int hwnd = (int) MainHandlArray[i];
WinApi.SetCurrnetFormHandle(hwnd);
WinApi.SetWindowsText(textBox_Class_EditPanel.Text,
textBox_Title_EditPanel.ToString(), textBox_Class_Edit.Text, textBoxWorkID.Text);

使用这种方法,我写个程序多开器,主要实现启动多个实例,能给EDIT框付值,能定时调用其中按钮。
单击在新窗口中打开图片,Ctrl+滚轮缩放图片


多开程序下载
https://files.cnblogs.com/yuanbao/mulicall.rar
posted @ 2007-11-01 14:53  阳光囧男  阅读(2233)  评论(0编辑  收藏  举报