Get list of folders inside a sharepoint document library

After doing a long search in net, I found a method to get the folder lists inside a document library. It cannot be achieved using a windows sharepoint webservice instead we should use frontpage RPC methods. List documents is one such method that will return the list of folders and documents inside a document library. But the return value will be in the HTML format. So i filtered only the folder names from it. Below i am giving the code snippet. This might be useful for you folks.