Building Windows version with OpenSSL support

I’m a little unclear on how to build Qt 4.6.3 with OpenSSL support. I’m running from my VS2008 command line window, but I see ‘openssl = no’ when I run configure. I have openssl installed in c:\openssl. I added c:\openssl\include to the INCLUDE env variable and c:\openssl\lib to LIB, but configure still says openssl = no. Do I need to pass confgure -openssl? Or do I just make and it will figure out where openssl is? As this process takes something like 5+ hrs, I’m hesitant to just try it!