Updating DescriptionViewer according to its target validation state

hi,

i have textblock, textbox , descriptionviewer.

i want use validation.

when textbox in invalid state (invalidunfocused, invalidfocused) want change color of descriptionviewer , textblock.

when textbo in valid state, want restore them original colors.

how do it?

 

thanks.

janiv ratson.

 

anyone?

thanks.

Silverlight  >  Silverlight Controls and Silverlight Toolkit