Dear Bruno thanks for answers. I think I can not explain what am I need.
I want to change one cell border. And the other cells should be free border color.
That is screen shut from my test project
Befor the button click
http://prntscr.com/81fh2l
After the button click
http://prntscr.com/81fhd5
But I want to do that
http://prntscr.com/81fhnm