heavenode wrote: m_passwordSet.Edit() //get error with this line //debug assertion dbcore.cpp line 1620 [...] may i know what's wrong?? What exactly do you want to do at CLoginDlg::OnBlogin()? Do you want to retrieve a user/password from the database, edit an existing one, or add a new pair? The call to Edit doesn't seem to make sense unless you already have a current record. -- jlr http://jlamas.blogspot.com/[^]

thanks, i found out the problem, it lies inside the constructor. the problem is solved after i removed the 'if section' code. does it mean i cant have an if statement inside constructor??? CTAMADlg::CTAMADlg(CWnd* pParent /*=NULL*/) : CDialog(CTAMADlg::IDD, pParent) { //{{AFX_DATA_INIT(CTAMADlg) m_hDevice = INVALID_HANDLE_VALUE; m_hClose = INVALID_HANDLE_VALUE; m_hClose = CreateEvent (NULL, TRUE, FALSE, NULL); if ( m_hClose == INVALID_HANDLE_VALUE ) { MessageBox("Thread event error!","Error",MB_OK); } //}}AFX_DATA_INIT m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); }

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