Re: __declspec(dllexport) in header from dll
GiuseppeDini wrote:
At point 4 in "To use the functionality from the class library in the
console application", a reference to the header from the dll is
created in the calling application.
But in the header, functions are defined with "static
__declspec(dllexport)" and now we need a different declaration "static
__declspec(dllimport)".
Why does it work?
Two things:
1. The 'static' looks extremely weird. It tells the compiler that the
function in question has internal linkage, i.e. that nothing outside the
current translation unit will reference it. Then, with the 'dllexport', you
tell the compiler to export the function from the DLL. This IMHO makes no
sense, remove the 'static'.
2. Typically, you use a macro like FOO_API that either resolves to
__declspec(dllexport) when compiling the DLL and to __declspec(dllimport)
when using the header from other code, which is the simple magic how this
works. Just take a look at a simple, wizard-generated DLL project.
Uli
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