Dynamically create textbox in vertical (example of code that generates horizontally here)

Dynamically create textbox in vertical (example of code that generates
horizontally here)

I am wanting to dynamically generate textbox `s where the user will enter
the number of textbox that will need, such as the code example below:
http://www.codeproject.com/Articles/14450/Dynamic-creation-of-ASP-NET-server-controls-on-fly
I did the tests and it works perfectly as I want, with just a detail, it
generates the textbox horizontally beside each other, I want do exactly
the same things but in vertical, generate a textbox one below the other.
If anyone can help me, I could not manipulate the code example to do this.
Thanks in advanced.