reporting services - How can I disable text box in ssrs reports? or can I add validation to textbox on focus out? -

reporting services - How can I disable text box in ssrs reports? or can I add validation to textbox on focus out? -

i have text box , date picker. user needs come in start , end date generate report.

how can create textbox disabled? if not then, can prompt message user date shown in wrong format whenever user enters date manually.

i want check performed before study fetched.

validation reporting-services textbox