A Refresh Area object can be used to mark out a block of code including HTML tags so that it is updated when the FORCE_REFRESH 4GL instruction is executed.
Inserting a Refresh Area object creates an <adelia:b_area/> 
opening tag and an <adelia:e_area/> 
closing tag.
The presence of an <adelia:b_area/> tag determines a link with the Adelia Web program to which the current HTML page belongs.
The Refresh Area tag creates a variable in the program's data environment, for which the identifier is given by the name attribute.
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see an example,
see more information about inserting a Refresh Area object.