output to textbox

I am a programming noob trying to jump into MFC programming. I am trying to create an mp3player using the mci controls. I am trying to get the get the remaining tim left in the song to display in a textbox. this is what i have so far in my play function.

Code:

void CMP3PlayerDlg::OnPlay() 
{
	int medialength;
	m_Video = NULL;
	if (m_Video == NULL)
	{
		m_Video = MCIWndCreate(this->GetSafeHwnd(), 
			AfxGetInstanceHandle(), 
			WS_CHILD | WS_VISIBLE|MCIWNDF_NOMENU,m_Path);
	}

	else
	{
		MCIWndHome(m_Video);
	}

	MCIWndPlay(m_Video);
	Pause = FALSE;
	MCIWndGetLength(m_Video);
	SetWindowText(
	//MCIWndGetPosition(m_Video);
}

A programming noob jumping into MFC doesn't sound very wise. If you don't understand the way classes work, or many other C++ features, I anticipate great problems in understanding MFC.