Specifies the UUID of the item.

Allowed on

Required for library, dispinterface, interface, and coclass; optional on struct, enum, union, module, and typedef


The uuidval is a 16-byte value formatted as hexadecimal digits in the following format: 12345678-1234-1234-1234-123456789ABC. This value is returned in the TypeAttr structure retrieved by TypeInfo::GetTypeAttr.

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