parameter passing via forms

hi,

I have a form called form1 which contains certain controls(textboxes,comboboxes,etc) in which I will enter some data(I will assign the respective textbox or combobox data into string variables). After that I want to send some data(string variables) to forms say form2,form3, and form4. I know to pass the data from one form to another form via overloaded constructor but if i want to send the variables from a single form(form1) to more than one form(form2,form3,form4,etc) how should i send the variables? and vice-versa(i.e., sending some variables from form2 and form3 to form1) plz help