C#

if(this.txt1.InvokeRequiered){

Invoke(new MethodInvoker(delegate
    {
    	this.txt1.Text = ComputedValue();
    }));

private void SetText(Control control, string text)
{
    if (InvokeRequired)
        Invoke(new MethodInvoker(delegate { SetText(textBox, text); }));
    else
        control.Text = text;
}

Dave<br>
<font size="-1">Tip: <a href="http://www.codeproject.com/tips/55555/Pass-value-between-forms-using-events.aspx">Passing values between objects using events (C#)</a></font><br>
<font size="-2">BTW, in software, hope and pray is not a viable strategy. (<a href="http://www.codeproject.com/Members/Luc-Pattyn">Luc Pattyn</a>)<br>Why are you using VB6? Do you hate yourself? (<a href="http://www.codeproject.com/script/Membership/View.aspx?mid=6556">Christian Graus</a>)</font>

//gets the data
public ... GetDatas(){
 cmd.CommandText = "SELECT * FROM XYZ";//or "EXEC SomeProcedure" or....;
 SQLDataReader dr = cmd.ExecuteReader();
 MyClass curr = null;
 List<MyClass> lst = new List<MyClass>;
 while(dr.Read()){
   curr = new MyClass();
   curr.Myprop1 = dr.GetString(0);//or GetWhatever
   ...
   lst.Add(curr);
 }
 ...
 return lst;
}

//and outside, somewhere in your UI
var myList = GetDatas();
dataGridView1.DataSource = myList