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;

}

 

 

 

typedef struct
{
 HWND hWnd;
 DWORD dwPid;
}WNDINFO;
 
BOOL CALLBACK EnumWindowsProc(HWND hWnd, LPARAM lParam)
{
 WNDINFO* pInfo = (WNDINFO*)lParam;
 DWORD dwProcessId = 0;
 GetWindowThreadProcessId(hWnd, &dwProcessId);
 
 if(dwProcessId == pInfo->dwPid)
 {
  pInfo->hWnd = hWnd;
  return FALSE;
 }
 return TRUE;
}
 
HWND GetHwndByProcessId(DWORD dwProcessId)
{
 WNDINFO info = {0};
 info.hWnd = NULL;
 info.dwPid = dwProcessId;
 EnumWindows(EnumWindowsProc, (LPARAM)&info);
 return info.hWnd;
}