C#

Combo.SetEditSel(i,i++);
Combo.SetDroppedWidth(j);
Combo.ShowDropDown();

string str = AU000AC20095=YBAX ,XS0088980494=MLIL,IT0003953350=HVBT 

SELECT ISIN_Universe_Id,ISIN,RIC,DateCreated from ISIN_Universe where ric in 
('AU000AC20095=YBAX','XS0088980494=MLIL','IT0003953350=HVBT')

public string CreateRICList(RICObject[] ricobj)
		{
			StringBuilder sb = new StringBuilder();

			sb.Append("'");
			for (int i=0; i<=ricobj.Length - 1; i++)
			{
				sb.Append("''");
				sb.Append(ricobj[i].RIC);
				sb.Append("''");
				sb.Append(",");
			}
			string lstrics = sb.ToString();
			if (lstrics.EndsWith(","))
				lstrics.Replace(",","'");

			return lstrics;
		}

EXEC ('SELECT ISIN_Universe_Id,ISIN,RIC,DateCreated from ISIN_Universe
WHERE RIC IN ( ' + ''+ @LISTOFRICS + ''+ ')
AND DATECREATED > ''' + @PREVDAY + ''' AND DATECREATED < '''+@NEXTDAY+'''')

CString strvalue;  // For Example strvalue is "A"	
CString strTemp;   //strTemp is lists in array
for()
{
 if(strTemp.Find(strvalue)==0)    // I will find "A" in array list
 m_ctrlCombo.AddString(strTemp);   // If found i will add it in Combo
}

ArrayList List = new ArrayList();

List.Add("AAA");
List.Add("AA");
List.Add("BB");
List.Add("BB");




for (int i = 0; i < List.Count; i++)
            
{
                        
 string value = List[i] as string;                
 if(value.Equals("AA"))
    comboBox1.Items.Add(value); 
}

The type or namespace name 'ArrayList' could not be found (are you missing a using directive or an assembly reference?)

using System.Collections.Generic 
using System.collection

std::map<CString,CString>m_mapId;  // Declared a Map

         m_mapId["AA"];
	 m_mapId["AAA"];       //storing values in the list
         m_mapId["BB"];
         m_mapId["BBB"];

CTest1View::OnEditchangeCombo1() 
{
	
	CString strvalue;  	
	CString strTemp;	
	m_ctrlCombo.GetWindowText(strvalue);	
	std::map<CString,CString>::iterator it=m_mapId.begin();
	m_ctrlCombo.ResetContent();	
	for(; it!=m_mapId.end();it++)
	{
		strTemp = it->first;		
		if(strTemp.Find(strvalue)==0)
			m_ctrlCombo.AddString(strTemp);
	
	}

	m_ctrlCombo.SetWindowText(strvalue);	
        m_ctrlCombo.ShowDropDown();	
	
	
}

List<string> cities = new List<string>(); // Declared a list

cities.Add("AAA");                        //storing values in the list
            cities.Add("AA");
            cities.Add("BBBB");
            cities.Add("BB");

comboBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            foreach (string A in cities)   //How to loop till end
            {
                MessageBox.Show(AA);        //  Get the result related to A
            }
      }