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 Delphi 2005 
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 $REGION 
 Delphi 2006 
 records 
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 Delphi 2007 
 Auto RTTI 
 Data Execution Prevention (DEP...  
 $DYNAMICBASE ON 
 $SETPEOPTFLAGS $100 
 Delphi 2009 
 Generics 
 Exit with result parameter 
 Anonymous methods 
 $POINTERMATH ON 
 Inner exceptions 
 Unicodestring 
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 $SCOPEDENUMS ON 
 deprecated with comment 
 $STRINGCHECKS ON 
 Put by ref properties 
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 Delphi 2010 
 Enhanced RTTI 
 Casting interfaces to objects 
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 Delphi XE 
 TVirtualMethodInterceptor 
 $STRINGCHECKS OFF 
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$DYNAMICBASE ON
Syntax
Further reading
Syntax
Setting $DYNAMICBASE ON enables Address Space Layout Randomisation (ASLR) on Vista and above providing enhanced protection against buffer overrun style security intrusions.
Further reading
Mike Devery (Emb.) describes the syntax for ALSR and NX support.
http://blogs.embarcadero.com/michaeldevery/2007/04/05/33777
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