How to convert unicode to url %xx type characters

[skylang]

I am trying to send a GET type url using an AutoIT script, but am running into a problem with Unicode characters. The variable part of the url contains some characters that are Unicode and somewhere along the line they get dropped. Is there a script or function somewhere that can change unicode characters in a string to url readable characters ("%xx" type characters)?

[Mat]

[skylang]

Fantastic, thanks. Google didn't come up with this so much obliged.