C++根据进程获取主窗口的句柄

原帖网址:http://www.cnblogs.com/ylhome/archive/0001/01/01/1529681.html

// processenum.cpp : Defines the entry point for the console application.

//

#include "stdafx.h"

#include <Windows.h>

#include <stdio.h>

#include <tchar.h>

#include <Psapi.h>

#include <string.h>

#pragma comment ( lib, "Psapi.lib" )

HWND lmshwnd;

BOOL CALLBACK EnumWindowsProc(HWND hwnd,DWORD lParam)

{ 

 DWORD mpid;

 GetWindowThreadProcessId(hwnd,&mpid);

 if (mpid==lParam)

 {

  int i=GetWindowTextLength(hwnd);

  char szhello[255];  

  char lmschar[255]=_T("名称");

  GetWindowText(hwnd,szhello,i+1);

  if (strstr(szhello,lmschar))

  {

   printf("%s\n",szhello);

   lmshwnd=hwnd;

  }

  

 }

 return TRUE;

}

 

void PrintProcessNameAndID( DWORD processID )

{

 TCHAR szProcessName[MAX_PATH] = TEXT("unknow");

 //根据进程ID,打开进程返回进程的句柄

 HANDLE hProcess = OpenProcess( PROCESS_QUERY_INFORMATION|PROCESS_VM_READ,FALSE,processID );

 //得到进程名

 if (NULL!=hProcess )

 {

  HMODULE hMod;

  DWORD cbNeeded;

  //EnumProcessModules根据句柄获取实例，保存到hMod中

  if (EnumProcessModules( hProcess,&hMod,sizeof(hMod),&cbNeeded) )

  {

   //获取根据进程句柄获取进程名称 szProcessName

   GetModuleBaseName( hProcess, hMod, szProcessName,sizeof(szProcessName)/sizeof(TCHAR) );

  }

 }

 //打印进程名和进程ID,其进程句柄为hProcess

 TCHAR *lmsname=TEXT("LMSVirtualLab.EXE");

 if (!strcmp(szProcessName,lmsname))

 {

  _tprintf( TEXT("%s  (PID: %x)\n"),szProcessName,processID);

  EnumWindows((WNDENUMPROC)EnumWindowsProc,processID);

  //HDESK hDesk=OpenDesktop(_T(""),0,FALSE,DESKTOP_ENUMERATE);   

  //EnumDesktopWindows(hDesk,(WNDENUMPROC)EnumWindowsProc,processID); 

 }

 CloseHandle( hProcess );

}

int _tmain(int argc, _TCHAR* argv[])

{

 // 得到进程ID的列表

 DWORD aProcesses[1024], cbNeeded, cProcesses;

 unsigned int i;

 //列举所有进程的ID，返回到aProcesses数组中

 if ( !EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded ) )

  return 0;

 //计算一共返回了多少个进程ID

 cProcesses = cbNeeded / sizeof(DWORD);

 //打印每个进程的名称和对应的ID

 for ( i = 0; i < cProcesses; i++ )

 {

  if( aProcesses[i] != 0 )

  {

   PrintProcessNameAndID(aProcesses[i]);

  }

 }

 printf("%x\n",lmshwnd);

 ShowWindow(lmshwnd,SW_MAXIMIZE);

 return 0;

}