windows 锁屏功能

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#include <windows.h> #include <iostream>   int main() {     int nScreenIndex = 0;     bool bIsLocked = false;     //获取系统指标，判断当前屏幕是否处于锁屏状态     if (GetSystemMetrics(nScreenIndex) == 1) {         bIsLocked = true;         std::cout << "the screen is locked!!" << std::endl;     }     if (bIsLocked) {         //计算机处于锁屏态         //执行锁屏状态下功能         /*******************/         /*******功能区******/         /*******************/         std::cout << "the screen is locked!!" << std::endl;     }     else {         //计算机处于非锁屏状态         std::cout << "the screen is unlocked!! to do lock!!" << std::endl;         //执行非锁屏状态下功能         /*******************/         /*******功能区******/         /*******************/         //锁屏         LockWorkStation();      }       return 0; }