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Compiler Error C2787

'identifier' : no GUID has been associated with this object

The __uuidof operator takes a user-defined type with a GUID attached or an object of such a user-defined type. This error occurs when the argument is a user-defined type with no GUID.

The following sample generates C2787:

// C2787.cpp
#include <windows.h>
struct F {};

struct __declspec(uuid("00000000-0000-0000-c000-000000000046")) F2;

int main() {
   __uuidof(F);   // C2787
   __uuidof(F2);   // OK
}

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