Compiler Error C3807

 

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The latest version of this topic can be found at Compiler Error C3807.

type' : a class with the ComImport attribute cannot derive from 'type2', only interface implementation is allowed

A type that derived from ComImportAttribute can only implement an interface.

The following sample generates C3807.

// C3807.cpp  
// compile with: /clr /c  
ref struct S {};  
interface struct I {};  
  
[System::Runtime::InteropServices::ComImportAttribute()]  
ref struct S1 : S {};   // C3807  
ref struct S2 : I {};  

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