C++获取进程号及窗口

#include <TlHelp32.h>

//根据进程名获取进程ID
BOOL GetPidByProcessName(TCHAR *pProcess, DWORD*dwPid) 
{ 
    HANDLE hSnapshot; 
    PROCESSENTRY32 lppe; 
    //创建系统快照 
    hSnapshot = ::CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL); 

    if (hSnapshot == NULL) 
        return FALSE; 

    //初始化 lppe 的大小 
    lppe.dwSize = sizeof(lppe); 

    //查找第一个进程 
    if (!::Process32First(hSnapshot, &lppe))
        return FALSE; 
    do 
    { 
        if(_tcscmp(lppe.szExeFile, pProcess) == 0)
        { 
            *dwPid =  lppe.th32ProcessID;
        }   
    } 
    while (::Process32Next(hSnapshot, &lppe)); //查找下一个进程  

    return TRUE;
}

//根据进程ID获取窗口句柄
HWND GetHwndByPid(DWORD dwProcessID)
{
    //返回Z序顶部的窗口句柄
    HWND hWnd = ::GetTopWindow(0);

    while ( hWnd )
    {
        DWORD pid = 0;
        //根据窗口句柄获取进程ID
        DWORD dwTheardId = ::GetWindowThreadProcessId( hWnd,&pid);

        if (dwTheardId != 0)
        {
            if ( pid == dwProcessID )
            {
                return hWnd;
            }
        }
        //返回z序中的前一个或后一个窗口的句柄
        hWnd = ::GetNextWindow(hWnd , GW_HWNDNEXT);

    }
    return hWnd;
}