C++ syntax

[Ratul Thakur]

i am a C++ student and i was reading some source code and found this :

void FGAPIENTRY glutMenuStateFunc( FGCBMenuState callback )
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutMenuStateFunc" );
fgState.MenuStateCallback = callback;
}

in the code above , the return type is void and the function name is glutMenuStateFunc() .. what does FGAPIENTRY stand for and where dois it come from?? I've also seen some similar stuff wile reading a tutorial in win32 api

[CPallini]

FGAPIENTRY is defined somewhere in your header chain (you have to look there to find it) as an attribute of the function. On Windows code a similar define is often used to add dllexport/dllimport attribute to the same function, depending on the kind of build you are performing (the DLL itself or the application using the same DLL). See, for instance c++ - Macro for dllexport/dllimport switch - Stack Overflow[^].

[Lost User]

The FGAPIENTRY prefix is a macro that declares the calling convention for the generated code. It is similar to the WINAPI macro as described in Windows Data Types (Windows)[^].

[David Crow]

Ratul Thakur wrote:

...what does FGAPIENTRY stand for...

Look in your project's header files. It resolves to this.

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