How to set Dynamic Columns in SSRS Reports?

hai 2 All,

how to call dynamic columns in ssrs reports, am googling find the link as 

http://sql-bi-dev.blogspot.in/2010/10/displaying-dynamic-columns-in-ssrs.html  , explain briefly how to call dynamic Fields 

Am Writing sql query as

-- get all the user details information statement
select Register_Id,(isnull (FirstName, ' ') + ' ' + isnull (LastName, ' '))As UserName, isnull (Country,'Not Available')As Country,Email as UserEmailId,isnull (Gender,'Not Available') as Gender,
replace (convert (varchar(11),DOB,106),' ', '-') as DateOfBirth,LanguageName,Religion ,
ImagePath,replace (convert (varchar(11),CreatedDate,106),' ', '-') As CreatedDate ,SocialNetwork_Type as NetworkType,Role_Name AS UserRole,
isnull (isActive, 'Not Available') As ActiveStatus
from Registration as reg
Left join Master_SocialNetwork as sn on reg.SocialNetwork_Id=sn.SocialNetwork_Id
Left join Master_Role as r on r.Role_Id=reg.Role_Id
Left join Master_Country as mc on mc.Country_Id=reg.Country_Id
Left join Master_Languages as l on l.Language_Id=reg.Language_Id
Left join Master_Religion as rel on rel.Religion_Id=reg.Religion_Id
where Register_Id in (SELECT * FROM dbo.SplitList(@Register_Ids, ','))

output:

Register_Id ,UserName ,Country,UserEmailId ,Gender ,DateOfBirth ,LanguageName, Religion, ImagePath ,CreatedDate ,NetworkType, UserRole ,ActiveStatus

And creating a ssrs reports , created a dataset as using this sql query getting result sucessfully

but i want to display dynamic columns for User Customization 

Thanks

Uma Mahesh