here's the one for nanopool, the pools are all somewhat different in detail,
EthDcrMiner64.exe -epool eth-us-west1.nanopool.org:9999 -ewal
In Windows, you'd make a desktop shortcut to that start.bat file and start your miner that way.
just changing that one line isn't going to do anything, you need to uncomment the "EthDcrMiner64.exe" command as well as the -epool/-ewal/-epsw ones. I like using a start.bt file because you explicitly feed it the details, the miner software doesn't have to go looking at the "defaults".
PS. I'm just learning this stuff by trial and error, I'm no 'expert'. I'm still trying to figure things out myself. At least, that one works.
PPS. I see I used my eth-only file, but the principle is the same for dual-mining. set the -dpool/-dwal/-d(etc) switches in the start.bat file as well.