Where does the padding of TextBox come from?

Question

I have already set all BorderThickness, Margin, and Padding to 0,0,0,0. Why is there still internal padding?

By the way, why is the text in TextBox of 24pt the same size of the text in TextBlock of 32pt?

Answer 1

This space is used for increasing touch area of a Button.

To remove it, in Expression Blend click Template - Create From Copy. Than go to xaml and find Padding="10,5,10,3" (something like that) and delete it.

Answer 2

You need to set Margin="-10,-10,-10,-10" to remove the extra space reserved by WP