assign textbox value to label

Question

Dear All,

 

I am sai shyam. Here i just want to know how to assign a value entered in a textbox to label in the next form.

 

example: I have 3 windows forms  1st page is login page, second page is a gridview and third form is a button located in a gridview when i click a button the form will open.

 

Now when i enter a name in login page i.e., username it should be reflected in 3rd form.

 

 Could you please help me out. Thank you.