What do you mean by print from the text box?

Do you want to "print" this to the screen, console, file, a physical printer?

to print text from form field to any other .. try the following
string s1=formobjectname.textfieldname.Text;

now u get the string in the object s1. now u can print it on console, file, form etc

To print to an actual document you're going to have to use a PrintDocument object, and override the PRINT event. Keep in mind though, that printing to a printer is very tricky at times, it's just like drawing with the 2D API. It's not like writing text to the screen, it's your job as the programmer to make sure all the lines fit and everything like that.