C / C++ / MFC

bool Thread::wait(const char* m,long ms) {
	HANDLE h = OpenMutex(MUTEX_ALL_ACCESS,FALSE,m);
	if(h == NULL) {
		throw ThreadException("Mutex not found");
	}
	DWORD d = WaitForSingleObject(h,ms);
	switch(d) {
	case WAIT_ABANDONED:
		throw ThreadException("Mutex not signaled");
		break;
	case WAIT_OBJECT_0:
		return true;
	case WAIT_TIMEOUT:
		throw ThreadException("Wait timed out");
		break;
	}
	return false;
}

CString strMessage;

strMessage.Format(L"A text file containing the boundary detals in the following format may be imported:\n"
    L"\nn (Number of boundary points, integer)"
    L"\nX_1         (X co-ordinate of first boundary point)"
    L"\nY_1         (Y co-ordinate of first boundary point)"
    L"\nX_2         (X co-ordinate of second boundary point)"
    L"\nY_2         (Y co-ordinate of second boundary point)"
    L"\n..."
    L"\n..."
    L"\n..."
    L"\nX_n         (X co-ordinate of n\'th boundary point)"
    L"\nY_n         (Y co-ordinate of n\'th boundary point)\n"
    L"\nThe X and Y co-ordinates can be any real values positive, negative or zero\n"
    L"\n\nNote: The existing data will be replaced with the content of the text file!"
    L"\n\nDo you have a text file in this format and wish to continue?");
if(MessageBox(strMessage,NULL,MB_YESNO|MB_ICONQUESTION)==IDNO)
    return;