Combobox and sliding text

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Hi, I'm new with visual studio mfc c++, I want to create a combo box. I wrote:

CString str;
	for (int i = 0; i < 20; i++)
	{
		str.Format(_T("item string %d"), i);
		combo.AddString(str);
	}

and then:

combo.GetLBText(combo.GetCurSel(), m_strTextCtrl);
	UpdateData(FALSE);// TODO: Add your control notification handler code here

but I don't know I must iniziatialize m_strTextCtrl

What I have tried:

I don't know how must initialize m_strTextCtrl

Posted 16-Sep-19 0:14am

Member 14594285

Updated 16-Sep-19 1:46am

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Richard MacCutchan · Accepted Answer · 2019-09-16T01:47:00

The destination variable should be a pointer to (wide) character buffer, or a reference to a CString object, as described in CComboBox::GetLBText | Microsoft Docs[^]. If this code is part of a dialog (and the UpdateData call suggests that it is), then the m_ prefix suggests that it should be a class variable, generated by the Class Wizard.