I think everyone is familiar with the program Raid Call, and who does not sign suggest that you will learn. This is a very good program for voice communication in games. In it there is a chip, a panel with different functions displayed in the game, and this panel Call a Raid is not designed for World of Tanks. On this page you can download free Raid Call for WOT c have already adapted panel for world of tanks.
Installation:
Run the installer and follow the instructions.
To enable overlay in-game, press F11 (you may need to press several times), transparency - CTRL + UP/ CTRL + DOWN.
ATTENTION! In windowed mode the overlay does not work.