Abstract: A tool for generating and executing graphical interface commands (OGEC) for an information system (SI) including heterogeneous platforms (PLC1-PLC4) disposed in a multi-protocol (PR1 through PR6) network (RE), comprising a descriptor file (FD) which describes the graphical interface to be produced in a specific grammar, means (AL) for verifying the grammar, means (MRG) for generating a graphical representation, connected to the verification means and to the graphical interface tools, means (AS) for checking the syntax of the data entered by the user into the graphical representation, multi-protocol means (ENC) for encapsulating the attributes of each command to be executed in the target platform(s) (PLC1 through PLC4), and means for receiving the attributes of each command and for executing it (EXEC1 through EXEC4) in accordance with these attributes.