create procedure sys.sp_MScheckcontext_bypasswholeddleventbit @is_biton bit output
as
begin
    declare @cur_context varbinary(128)
    declare @cur_context_first_byte binary(1)
    declare @returnbitmask tinyint

    select @returnbitmask = 64

    -- get the current context_info.
    select @cur_context = isnull(context_info(),0x00)

    -- get the first byte out of the 128 byte array.
    select @cur_context_first_byte = substring(@cur_context, 1, 1)

    -- check whether it has the merge agent bit set.
    select @returnbitmask = (convert(tinyint,@cur_context_first_byte) & @returnbitmask)
    -- set the output param value appropriately.
    select @is_biton = case when @returnbitmask = 0 then 0 else 1 end
    return 0
end