[RESOLVED] [MFC] Modal Dialog Question

im making a simple "Input Dialog" that will return the value of an Edit Box back to the calling Dialog

Code:

---

        CInputDlg InputDlg(this);

        if(InputDlg.DoModal() == IDOK)
        {
                CString res= InputDlg.ReturnName();
        }

---

Code:

---

CString CInputDlg::ReturnName()
{
        //wchar_t test[260]={0};
        CString res;
        GetDlgItemText(IDC_Rename,res);
return res;
}

---

but application crashes on GetDlgItemText() with "Debug Assertion Failed"

any ideas why?
thanks

After DoModal the controls don't exist any more. If you use the standard DDX mechanism, you get the value from the member variable, not the control.

Control's don't exist before you call DoModal() and no longer exists after DoModal() returns. To get the values from the controls, you must store them in class fields (variables) before the window is destroyed and read them from the parent window.

thank you both... now i understand , and problem fixed :)