Visual C++ Compiler Warning C4234

Message Text

nonstandard extension used : 'keyword' keyword reserved for future use


At present, the keywords that are disabled as reserved in the sense of triggering this warning are:

__nounwind, __resume and (unless -Binl is active) __thiscall


This warning is promoted to an error automatically (as if the corresponding -we option were generated internally before the compiler acts on options from the command line). By default however, this is a level 1 warning and a

#pragma warning (default : 4234) 

restores it to level 1 (no matter that the product documentation assigns this warning to level 4).