Update Datagridview using textbox in VB.net

Dear All,

I want to update all records in one column in Datagridview to the same value in textbox.

Example:

Textbox value: xxx

But in datagridview:

Column1:

xx01

xx02

xx03

so, i want to change it to be like this if i click on Button:

Column1

xxx

xxx

xxx

How to write code in VB.net?

Regards,

Ratana, Cambodia