Introduction - If you have any usage issues, please Google them yourself
Purpose: communication gui. Method: 1. Opened by gui1 gui2, and to read data from gui2 drawing (2) the transfer of the packet: a packet defined in gui1, including strings, data packets passed to gui2 updated by gui2 the updated data in the returned gui1 and displayed. (Note: the program plus the the black underlined part to achieve the desired functionality of the points)