ShellExecute(this->m_hWnd,"open",strTarget,NULL,NULL,SW_SHOW);

void CTypeManualDlg::OnBtnReleasedoc() 
{
    // TODO: Add your control notification handler code here
    UpdateData(TRUE);
    CString strTarget="\\\\xxx\\xxx\\" + this->m_ReleaseDoc;
    CString cmd="explorer "+strTarget;
    ShellExecute(this->m_hWnd,"open",strTarget,NULL,NULL,SW_SHOW);    
}