Function CryptMsgOpenToDecode
pub unsafe fn CryptMsgOpenToDecode(
dwmsgencodingtype: u32,
dwflags: u32,
dwmsgtype: u32,
hcryptprov: Option<HCRYPTPROV_LEGACY>,
precipientinfo: Option<*const CERT_INFO>,
pstreaminfo: Option<*const CMSG_STREAM_INFO>,
) -> *mut c_void