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Compiler Warning (level 1, Error) C4394

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'function' : per-appdomain symbol should not be marked with __declspec(dllexport)

A function marked with the appdomain __declspec modifier is compiled to MSIL (not native), and export tables (export __declspec modifier) aren't supported for managed functions.

You can declare a managed function to have public accessibility. For more information, see Type visibility and Member visibility.

C4394 is always issued as an error. You can turn off this warning or change its level with #pragma warning or /wd. For more information, see warning or /w, /W0, /W1, /W2, /W3, /W4, /w1, /w2, /w3, /w4, /Wall, /wd, /we, /wo, /Wv, /WX (Warning Level).

Example

The following sample generates C4394.

// C4394.cpp
// compile with: /clr /c
__declspec(dllexport) __declspec(appdomain) int g1 = 0;   // C4394
__declspec(dllexport) int g2 = 0;   // OK