SQL Function to make all TEXT to propercase in SQL Server

create function ConvertToTitleCase(@Text as varchar(8000))
returns varchar(8000)
as
begin
  declare @Reset bit;
  declare @Ret varchar(8000);
  declare @index int;
  declare @c char(1);

  if @Text is null
    return null;

  select @Reset = 1, @index = 1, @Ret = '';

  while (@index <= len(@Text))
    select @c = substring(@Text, @index, 1),
      @Ret = @Ret + case when @Reset = 1 then UPPER(@c) else LOWER(@c) end,
      @Reset = case when @c like '[a-zA-Z]' then 0 else 1 end,
      @index = @index + 1
  return @Ret
end

declare @input varchar(8000) = 'this is a developerpublish.com portal'

select [dbo].[ConvertToTitleCase](@input)