C / C++ / MFC

CListBox* ExpressionsListBoxPtr;
CListBox* FiltersListBoxPtr;
CListBox* TargetsListBoxPtr;

ExpressionsListBoxPtr = (CListBox*)(GetDlgItem(IDC_DLGS_EXPRESSIONLISTBOX));
FiltersListBoxPtr = (CListBox*)(GetDlgItem(IDC_DLGS_FILTERLISTBOX));
TargetsListBoxPtr = (CListBox*)(GetDlgItem(IDC_DLGS_TARGETLISTBOX));

afx_msg void CRatiosNewSearchDialog::OnAddFilter()
{
	CListBox* TempListBoxPtr = (CListBox*)(GetDlgItem(IDC_DLGS_EXPRESSIONLISTBOX));
	//int CurrentSelection = ExpressionsListBoxPtr->GetCurSel();
	int CurrentSelection = TempListBoxPtr->GetCurSel();
	
	int Pos = 0;
	CString Expression = "";

	if(CurrentSelection == LB_ERR)
		MessageBox("You must select an expression before you can add a filter. LB_ERR.", "User Error", MB_ICONHAND);
	else //everything is cool, add the expression to the filter list box
	{
		ExpressionsListBoxPtr->GetText(CurrentSelection, Expression);
		Pos = Expression.Find(" - ", 0);
		Expression.Delete(0, Pos + 3);
		Pos = FiltersListBoxPtr->AddString(Expression);
		ResetListboxScrollbar(FiltersListBoxPtr);
		FiltersListBoxPtr->SetCurSel(Pos);
	}
}