Creating TextBox Dynamically and Taking Values from them (page load problem)

Hi my friends,
My problem is that;
I have 1 textBox, 1 create button, 1 save button and 1 listBox. I create textBoxes according to the value that is entered to textBox by the user... I have made the job up to here... Think of entering ' 3 ' for example... We clicked on 'create' button. 3 new textBox was created. User entered some values as a string into that textBoxes. I want that, When user clicked on save button, the values that i have entered, will be listed in listBox  . I couldnt solve this problem because, the textBoxes that i created before, dissappears because of the page load... So i cannot take values of these dynamically created textboxes... How can i handle that problem ... if you could send me a sample code for this, i'll really be happy...

 
Code that i created textBoxes dynamically is here ; 

        protected void Add()
     &n ...