Compiler Error C3121
cannot change GUID for class 'class_name'
You attempted to change the class ID with __declspec(uuid).
For example, the following code generates C3121:
// C3121.cpp
[emitidl];
[module(name="MyLibrary")];
[coclass, uuid="00000000-0000-0000-0000-111111111111"]
class __declspec(uuid("00000000-0000-0000-0000-111111111112")) A // C3121
{
};
int main()
{
}
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