C#获取系统当前是否处于锁屏状态 |
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C#获取系统当前是否处于锁屏状态
C#引用代码如下： [DllImport("GetScreendll.dll", CallingConvention = CallingConvention.Cdecl)] extern static bool IsSessionLocked(); public main() { InitializeComponent(); if (IsSessionLocked() != true) //获取当前电脑是否处于锁屏状态下 { //Unlock }else { //Lock } } c++生成dll 代码如下： getScreendll.cpp代码： #include "stdafx.h" #include "GetScreendll.h" #include "stdafx.h" #include #include bool IsSessionLocked() { typedef BOOL(PASCAL * WTSQuerySessionInformation)(HANDLE hServer, DWORD SessionId, WTS_INFO_CLASS WTSInfoClass, LPTSTR* ppBuffer, DWORD* pBytesReturned); typedef void (PASCAL * WTSFreeMemory)(PVOID pMemory); WTSINFOEXW * pInfo = NULL; WTS_INFO_CLASS wtsic = WTSSessionInfoEx; bool bRet = false; LPTSTR ppBuffer = NULL; DWORD dwBytesReturned = 0; LONG dwFlags = 0; WTSQuerySessionInformation pWTSQuerySessionInformation = NULL; WTSFreeMemory pWTSFreeMemory = NULL; HMODULE hLib = LoadLibrary(L"wtsapi32.dll"); if (!hLib) { return false; } pWTSQuerySessionInformation = (WTSQuerySessionInformation)GetProcAddress(hLib, "WTSQuerySessionInformationW"); if (pWTSQuerySessionInformation) { pWTSFreeMemory = (WTSFreeMemory)GetProcAddress(hLib, "WTSFreeMemory"); if (pWTSFreeMemory != NULL) { DWORD dwSessionID = WTSGetActiveConsoleSessionId(); if (pWTSQuerySessionInformation(WTS_CURRENT_SERVER_HANDLE, dwSessionID, wtsic, &ppBuffer, &dwBytesReturned)) { if (dwBytesReturned > 0) { pInfo = (WTSINFOEXW*)ppBuffer; if (pInfo->Level == 1) { dwFlags = pInfo->Data.WTSInfoExLevel1.SessionFlags; } if (dwFlags == WTS_SESSIONSTATE_LOCK) { bRet = true; } } pWTSFreeMemory(ppBuffer); ppBuffer = NULL; } } } if (hLib != NULL) { FreeLibrary(hLib); } return bRet; } getScreendll.h代码： #pragma once extern "C" __declspec(dllexport) bool IsSessionLocked(); 与接收Windows消息获得是否处于锁屏状态的区别： Dll方式：上面采用dll去获取系统是否处于锁屏状态是可以实时的获取 如：在系统处于锁屏状态的情况下去调用此dll，可得到系统处于锁屏状态 Windows消息方式：此方式只能在系统状态发生改变时，才能获取到系统当前状态 如：当程序启动的过程中，进行锁屏动作。这时windows消息方式是不能获取到系统的当前的状态的 因为系统从桌面到锁屏状态时，程序有可能还没能成功启动，而此方式只能在系统状态发生改变时，才能获取到系统当前状态，所以此时无法获取到系统是否处于锁屏状态。 windows方式获取系统状态请跳转到下面链接： https://blog.csdn.net/weixin_45526252/article/details/123321930 参考资料： [https://blog.csdn.net/FlushHip/article/details/83141062] |
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