二进制入门学习笔记-13.窗口查找与修改

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1. 顶级窗口查找与修改

1.0 FindWindow函数解析

1.函数定义如下：

HWND FindWindowA(
  LPCSTR lpClassName, //类名，注册窗口时候调用RegisterClass设置的名称，如果填NULL表示忽略类名
  LPCSTR lpWindowName //窗口标题名称
);

1.1 修改主窗口标题示例

1.打开一个记事本程序，默认标题如下图所示为无标题 - 记事本：

2.获取这个记事本的句柄，代码如下：

#include "stdafx.h"
#include <windows.h>
int main(int argc, char* argv[])
{
    HWND hwnd = ::FindWindow(NULL,"无标题 - 记事本");                         
    if(hwnd != NULL)                            
    {                           
        //修改窗口标题                        
        ::SetWindowText(hwnd,"记事本标题修改测试");                      
    }                           
    else                            
    {                           
        ::MessageBox(NULL,TEXT("窗口没有找到"),TEXT("[ERROR]"),MB_OK);                        
    }                                                       
}

3.运行后效果如下图：

1.2 控制主窗口

获取记事本窗口句柄，切换到记事本窗口，三秒后关闭，代码如下：

#include "stdafx.h"
#include <windows.h>
int main(int argc, char* argv[])
{
    HWND hwnd = ::FindWindow(NULL,TEXT("无标题 - 记事本"));                               
    if(hwnd != NULL)                                
    {                               
        typedef void (WINAPI *PSWITCHTOTHISWINDOW) (HWND,BOOL);                         
        PSWITCHTOTHISWINDOW SwitchToThisWindow;                         
        HMODULE hUser32=LoadLibrary("user32.dll");                          
        SwitchToThisWindow=(PSWITCHTOTHISWINDOW)GetProcAddress(hUser32,"SwitchToThisWindow");                           

        //切换窗口                          
        SwitchToThisWindow(hwnd,false);                         

        Sleep(3000);//等待三秒
        //关闭窗口                          
        ::SendMessage(hwnd,WM_CLOSE,0,0);                           
    }                               
    else                                
    {                               
        ::MessageBox(NULL,TEXT("窗口没有找到"),TEXT("[ERROR]"),MB_OK);                            
    }                                                                                   
}

2.子窗口的查找与修改

2.1 子窗口的查找

void Test()  
{  
    HWND hParentwnd = NULL;  
    hParentwnd = FindWindow(NULL, TEXT("ParentWnd"));
    while(true)  
    {   
        HWND hwnd = NULL;  
        HWND hwndTmp = ::FindWindowEx(hParentwnd, hwnd, NULL, TEXT("ChildWnd"));  

        if(!hwndTmp)
        {
            ::MessageBox(NULL,TEXT("窗口没有找到"),TEXT("[ERROR]"),MB_OK);
            break;
        }
        else  
        {  
           ::SetWindowText(hwndTmp,"文本框新的标题");
            //::SendMessage(hwndTmp,WM_SETTEXT,0,(LPARAM)"新的内容");
        } 
    }  
}

2.2.枚举子窗口

#include "stdafx.h"
#include <windows.h>

BOOL CALLBACK EnumChildProc(HWND hWnd,LPARAM lParam)                    
{                   
    TCHAR szTitle[MAX_PATH] = {0};                  
    ::GetWindowText(hWnd,szTitle,MAX_PATH);                     
    MessageBox(NULL,szTitle,"[子窗口]",MB_OK);                     
    return true;                    
}                   
int main(int argc, char* argv[])
{                                                       
    HWND hWnd = ::FindWindow(NULL,TEXT("无标题 - 记事本"));                               
    if(hWnd != NULL)                                
    {                               
        ::EnumChildWindows(hWnd,EnumChildProc,0);                           
    }                               
    else                                
    {                               
        ::MessageBox(NULL,TEXT("窗口没有找到"),TEXT("[ERROR]"),MB_OK);
    }
}

3.模拟鼠标点击

#include "stdafx.h"
#include <windows.h>

#pragma   comment(linker,"/subsystem:\"windows\"  /entry:\"mainCRTStartup\""   )//隐藏控制台                 
int main(int argc, char* argv[])
{                                                       

    TCHAR szTitle[MAX_PATH] = {0};  
    RECT r; 
    HWND hwnd = ::FindWindow(TEXT("#32770"),TEXT("飞鸽传书  IP Messenger"));    
    if(hwnd != NULL)    
    {   
        HWND hButton = FindWindowEx(hwnd,NULL,"Button","刷新(&R)");

        //获取窗口坐标
        ::GetWindowRect(hButton,&r);

        printf("%d %d",r.left,r.top);

        //设置鼠标的位置
        ::SetCursorPos(r.left+10,r.top+10);
        Sleep(2000);
        //鼠标左键单击
        mouse_event(MOUSEEVENTF_LEFTDOWN,0,0,0,0);//点下左键 
        mouse_event(MOUSEEVENTF_LEFTUP,0,0,0,0);//松开左键
    }   
    else    
    {   
        ::MessageBox(NULL,TEXT("窗口没有找到"),TEXT("[ERROR]"),MB_OK);
    }   

}