How to call function from Store procedure in ms sql 2008,Store procedure is saved in Store procedure Folder of microsoft sql management studio and function in Function>Scalar function

ALTER FUNCTION [vainimarketing].[dbo.Countnode](@node AS varchar(50))
Returns INT
AS
BEGIN
Declare @lnode Varchar(50)
Declare @rnode Varchar(50)
Declare @result INT
Select @lnode=LeftChild,@rnode=RightChild From Tree where ParentId=@node;
if(@lnode=0 AND @rnode=0)
begin
Set @result=1;
end
else
begin
set @result=1+(dbo.Countnode(@lnode)+dbo.Countnode(@rnode));
end
return @result;
END

set @lcount= vainimarketing.dbo.Countnode(@lchild);
set @rcount= vainimarketing.dbo.Countnode(@Rchild);