I use ADT to try to make android apps, and use AVD. I know there is another tool called adb. I know it has been installed, and I want try to use it to send comm
The short answer is adb is used via command line. find adb.exe on your machine, add it to the path and use it from cmd on windows.
"adb devices" will give you a list of devices adb can talk to. your emulation platform should be on the list. just type adb to get a list of commands and what they do.