C#

<br />
private void StartProcess()<br />
{<br />
this.bgWorker.RunWorkerAsync();<br />
}<br />
<br />
private void bgWorker_DoWork()<br />
{<br />
AddCNums();<br />
}<br />
<br />
private void AddCNums()<br />
{<br />
for(int i = 0; i < 20, i++)<br />
{<br />
this.bgWorker.ReportProgress(0, i)}<br />
}<br />
<br />
}<br />
<br />
private void bgWorker_ReportProgress(object sender, ProgressChangedEventArgs e)<br />
{<br />
if(e.ProgressPercentage == 0)<br />
{<br />
int i = (int)e.UserState;<br />
this.cText.Text += ("Main thread: {0}\n", i);<br />
<br />
}<br />
}<br />
<br />
<br />

private delegate void TextBoxUpdater(TextBox t, String s);
private void UpdateTextBox(TextBox t, String s){
    if(t.InvokeRequired) {
        t.Invoke(new TextBoxUpdater(UpdateTextBox), Object[]{t, s}));
    } else {
        t.Text = s;
    }
}

//Declare a Deleagte for the type of the Function u will use<br />
//see that that if i had an <br />
//public void function()<br />
//so the declartion of the deleage would look like this :<br />
//public delegate void RefToFunction();<br />
//without the parameter<br />
<br />
public delegate void RefToFunction(string s);<br />
<br />
//create an instance of the delegate like this:<br />
// and give it the function u like to invoke<br />
<br />
RefToFunction handle = new RefToFunction(UpdateTextBox);<br />
<br />
//declare the param an wrap it in a object array<br />
<br />
string s = "Test";<br />
object[] param = { s };<br />
<br />
//Invoke with the handle and the param<br />
//where u need to invoke it<br />
//if u did not have any param so just :<br />
//this.Invoke(handle);<br />
<br />
this.Invoke(handle, param);<br />
<br />
//the implemntation of the function<br />
<br />
public static void UpdateTextBox(string s)<br />
{<br />
MessageBox.Show(s);<br />
}ode><br />
<br />
i did a lot of research about this so i hope i helped<br />
if u need any clarification just reply :):) <br />
<br />
<div class="ForumSig">Have Fun<br />
Never forget it</div>