C++根据进程获取主窗口的句柄

// 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;
}