Providing control of a first computing device from a second computing device, including accessing an electronic message received by an electronic message application in the first computing device from the second computing device, extracting a command from the received electronic message, selecting from a plurality of function calls at least one function call corresponding to the extracted command, initiating execution of the at least one function call, obtaining output data from each executed function call, composing an output electronic message for each executed function call, the output electronic message being directed to a specific address and containing the output data from the executed function call, and sending each output electronic message via the electronic message application to the specific address.