This include-file determines the way the classes and functions in the library are exported.
It determines Whether they are used as a dynamic or as application and static library.
When building this Dynamic Library then _MISC_PKG (package) should be defined.
List of the declaration modifiers for types:
classes: _GII_CLASS
Function: _GII_FUNC
Data: _GII_DATA
Add compiler definition flags:
_GII_PKG when building a dynamic library (package)
_GII_ARC when including it in a compilation or using it as an archive.