How to use controls of one class in another class in c#.net

[neehakale]

I have one text box button, say by name txtmessage in one form (MainForm )and what i have to do is on click of OK buttton in the other form (SubForm) I have to write some message in that txtmessage text box....please help me to do this

[kenobewan]

Here is an article that may help:
Coding a 'One-to-Many' Form with ASP.NET

[Munawar]

hi, if you have windows applicationt then you can do that as following:
lets suppose on form1 you have a button and on form2 has textbox

you can make textbox public on form2 and then in form1 create instance of form2 and set the value of textbox

in button click event write the following..
Form2 f=new Form2()
Form2.TextBox1.Text="hello"
this.close()

further you can create a public property on form2 and set the value from any other form

 public string UserID
        {
            set
            {
                this.textBox1.Text = value ;
            }
            get
            {
                return UserID ;
            }
        }   

thanks,
Munawar