This may just be a mistake on your posting the code...but maybe you should try:

Form2.Text1.Value = Form2.Text1.Value + Form1.Text1.Value

>Lets say i have 2 forms named form1 and form2...ok?
>i want a button to make form1's textbox text to append the the end of form2's textbox.
>i understand: Form2.Text1.Text = Form1.Text1.Text
>but this clears out Form2.Text1's text and replaces it with Form1.Text1's Text.
>I want to beable to do this:
>Form2.Text1.Value = Form2.Text1.Text + Form1.Text1.Text
>but it doesn't work i click the button and it keeps copying over the current value of Form2.Text1.Text and I want to keep it...