Telerik Web UI dll

[Shree]

i am developing a tool where i need a drag and drop option in the treeview. i found about telerik which is easier way to use that in asp.net.
multiple people will be working on this tool in organization. So can i use telerik webUI dll in building the application?.. Do i need to buy it or can i use it for free of cost.
I am just using Telerik Dll please suggest me.

[Shinu]

Hi Shree,

Please take a look into the following help documentation for Installing Telerik Controls.

Which File Do I Need to Install?
Installing the Telerik Controls from ZIP File
Installing the Telerik Controls from MSI File

Thanks,
Shinu.