是的，您可以使用SetWinEventHook函数。
hEvent = SetWinEventHook(EVENT_SYstem_FOREGROUND ,
EVENT_SYstem_FOREGROUND , NULL,
WinEventProcCallback, 0, 0,
WINEVENT_OUTOFCONTEXT | WINEVENT_SKIPOWNPROCESS);
.......
VOID CALLBACK WinEventProcCallback ( HWINEVENTHOOK hWinEventHook, DWORD dwEvent, HWND hwnd, LONG idObject, LONG idChild, DWORD dwEventThread, DWORD dwmsEventTime)
{
/* your code here */
}
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