How to change TextBox from another class.

[as2010]

Hi everybody.
I'm doing a simple chat remote aplication in C# (.net remoting 2.0). The client receives a message in a class called Cliente and must be showed on a textBox in the form that is in Form1 class. I don't know how to change the textbox Text in the Cliente instance class.

My code is like that:


Class Form1 { //the form class

(...)
public void addTxt(string msg){
this.chatTextBox.Text+=msg
}
}


Class Cliente{

(..)

public void receiveMessage(string msg){
//The remote client method
//I Want to add msg to the textBox

}
I

I'm trying to pass Form1 in the Cliente constructor, but it goes null when the receiveMessage method in Cliente class is called.

Can someone help me?
Thanks