Function winapi::um::wincrypt::CryptInstallCancelRetrieval

pub unsafe extern "system" fn CryptInstallCancelRetrieval(
    pfnCancel: PFN_CRYPT_CANCEL_RETRIEVAL, 
    pvArg: *const c_void, 
    dwFlags: DWORD, 
    pvReserved: *mut c_void
) -> BOOL