pub unsafe fn SLInstallProofOfPurchase<P0, P1>(
    hslc: *const c_void,
    pwszpkeyalgorithm: P0,
    pwszpkeystring: P1,
    pbpkeyspecificdata: Option<&[u8]>,
) -> Result<GUID>
where P0: Param<PCWSTR>, P1: Param<PCWSTR>,