how to use textBox1_TextChanged event with 2 digits?

Hi

i want to enter in a textbox a number using textBox1_TextChanged event in order to avoid to have to clicking on it or on a button. That value comes into a variable. It's fine until i want to enter a number of 2 digits. In that case is only the first digit coming into the variable.

Any suggestion to solve this (if possible not to have to click elsewhere)?.

Thanks