// Заполняем sa на доступ всем юзерам
SECURITY_ATTRIBUTES sa;
SECURITY_ATTRIBUTES * psa = &sa;
TCHAR ForSecurityDescriptor[SECURITY_DESCRIPTOR_MIN_LENGTH];
SECURITY_DESCRIPTOR * psd = (SECURITY_DESCRIPTOR *)ForSecurityDescriptor;;

if(InitializeSecurityDescriptor(psd, SECURITY_DESCRIPTOR_REVISION))
	if(SetSecurityDescriptorDacl(psd, TRUE, (PACL) NULL, FALSE))
	{
		psa->nLength = sizeof(*psa);
		psa->lpSecurityDescriptor = psd;
		psa->bInheritHandle = TRUE;
	}
	// Выделяем память под имена
	hFileMap = CreateFileMapping(INVALID_HANDLE_VALUE, &sa, PAGE_READWRITE,  0 , RECCOUNT * sizeof(sctRecord), _TEXT("Global\\MutexGeneralMemory"));
...