ERROR on E: EIdSocketError do begin - Delphi

I'm starting in Delphi , and creating a program to download ... In which I realize that when I try to download and type a wrong URL and it can not download ... Generates the error Error # 10060 Socket connection Time out ... I know that this error is generated when it gets too long trying to make a connection to a URL that does not exist .... ``` E: EIdHTTPProtocolException ``` he Raises the number 0 (zero ) Error ... it does not exist in HTTP ... I'm trying to prevent this error appears , it stops trying to access the page ... but I want the response to this error ... and cause it not to appear .... I believe it is using: `on E: EIdSocketError the begin` ... But the program generates error when I try to use : `undeclared undefined EIdSocketError` How am by starting in delphi ... I do not know where I'm going wrong ... how to correct this error : undeclared undefined EIdSocketError [ dcc32 Error] Unit1.pas ( 162 ) : E2003 Undeclared identifier: ' EIdSocketError ' ``` except          on E: EIdSocketError do begin          end ;          on E: EIdHTTPProtocolException the              Begin              / / Handle the error generated                code_erro : = IdHTTP.ResponseCode ;              / / code_erro : = E.ErrorCode ;              end         end ; ```