how to decode URI Component in vb6(removing %% from urls)?

Hi all . I got urls as variable but they are in diffrent format like this:

http%3A%2F%2Fw3schools.com%2Fmy%20test.asp%3Fname%3Dst%C3%A5le%26car%3Dsaab

I wonder how i can remove those % and make it like this?:
http://w3schools.com/my test.asp?name=ståle&car=saab