И вот что у меня получилось:

_Project2.pas(74,63) Error: identifier idents no member "_work_doOperation"
_Project2.pas(159) Fatal: There were 1 errors compiling module, stopping
Error: D:\Program Files\HiAsm\compiler\fpc\ppc386.exe returned an error exitcode (normal if you did not specifiy a source file to be compiled)


D:\Program Files\HiAsm\Elements\Delphi\code\_Project2.dpr(74) Error: Undeclared identifier: '_work_doOperation'