How do I set value from textbox to Global Variable?

Lets say i have textbox thats saying: 23 and i want to assign that number 23 to global variable as a number is that possible at all and how do i do that?I know i can assign Value from global variable to text box by writing &NameofGV but i dont need that i need oposite.

Yeah its possible, system -> set value -> select the variable and in the box type mytextboxname.text

Yeah its possible, system -> set value -> select the variable and in the box type mytextboxname.text

Yup that worked thanks buddy