warning to make a choice for editBox

[Emre Zorlu]

I can use if(ndx=m_comboBox.GetCurSel()==LB_ERR) { MessageBox("please,choose one of them !"); return; } for comboBox. How can I warn when I use editBox? emroz

[wb]

CString s; m_editBox.GetWindowText(s); if(s.IsEmpty()){ ......... }

[wb]

I dont exactly understand what you want, but maybe: if(a!=c) ((atof(a)/atof(e))*(atof(e)-atof(f)))/(atof(a)-atof(c)) of you will get a div by zero bugy some day.

[David Crow]

if (m_edit.GetWindowTextLength() == 0)
MesssageBox("Please enter some text!", ...);