In asp you may need to send a URL with it's own querystrings, such as:
www.example.com?type=1&value=2

as the value for a querystring in something else, such as:
www2.example.com?type=3&value=4&site=www.example.com?type=1&value=2

but you may find the value gets cutoff after the first &, such as:
www.example.com?type=1

replacing the & character with %26 may be sufficent...

& is %26
? is %3F
= is %3D
\ is %5C (note: backslash like in DOS command-line paths)
- is %2D