윈도우 resize min, max 설정

ON_WM_GETMINMAXINFO()

void CHostChatDlg::OnGetMinMaxInfo(MINMAXINFO* lpMMI)
{
	 lpMMI->ptMinTrackSize.x,  y
         lpMMI->ptMaxTrackSize.x, y 

	CDialog::OnGetMinMaxInfo(lpMMI);
}