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windows_link::link!("ole32.dll" "system" fn CoCreateGuid(pguid : *mut GUID) -> HRESULT); #[repr(C)] #[derive(Clone, Copy, Default)] pub struct GUID { pub data1: u32, pub data2: u16, pub data3: u16, pub data4: [u8; 8], } pub type HRESULT = i32;