Oppure
#include <stdio.h> #include <windows.h> int WINAPI WinMain (HINSTANCE hThisInstance, HINSTANCE hPrevInstance, LPSTR lpszArgument, int nFunsterStil) { HANDLE CurrMutex=CreateMutexA(0,1,"mymutex"); if( CurrMutex==0 || WaitForSingleObject(CurrMutex,100)!=0) { CloseHandle(CurrMutex); return 0; } Sleep(5000); ReleaseMutex(CurrMutex); return 0; }