VC++根據explorer.exe進程檢測用戶是否已登錄

    下面來看一個VC++根據explorer.exe進程檢測用戶是否已登錄,希望例子能幫助到各位。
    代碼如下
    void CALLBACK timeCall(UINT timeid, UINT umsg, DWORD_PTR dwUser, DWORD dw1, DWORD_PTR dw2)
    {
    DWORD dwSessionId = WTSGetActiveConsoleSessionId(); //獲取控制臺的session
    HANDLE hSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0); //為創(chuàng)建環(huán)境快照
    if (hSnap == INVALID_HANDLE_VALUE)
    return;
    //遍歷快照，通過快照的 procEntry.szExeFile 獲取應用程序名字,從而取得相應的PID
    PROCESSENTRY32 procEntry;
    procEntry.dwSize = sizeof(PROCESSENTRY32);
    Process32First(hSnap, &procEntry);
    DWORD dwExplorerPid = -1;
    do
    {
    if (strcmp(procEntry.szExeFile, "explorer.exe") == 0)
    {
    DWORD dwExplorerSessId = 0;
    if (ProcessIdToSessionId(procEntry.th32ProcessID, &dwExplorerSessId) && dwExplorerSessId == dwSessionId)
    {
    dwExplorerPid = procEntry.th32ProcessID;
    break;
    }
    }
    } while (Process32Next(hSnap, &procEntry));
    LOG_INFO("檢測用戶是否已經登錄 : %s", (dwExplorerPid == -1) ? "未登錄" : "已經登錄");
    if (dwExplorerPid != -1)
    {
    //已登錄
    DoSomething();
    }
    }