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。

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);    //為創建環境快照
 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();