From Xojo Documentation
Controls the mode in which the shell operates. The shell can be running in Synchronous, Asynchronous, or Interactive modes.
See Shell.ExecuteModes for descriptions of each available mode.
The following terminal application allows you to submit Unix commands using the interactive mode. The interface consists of two TextFields, InputField, in which the user can enter a command, and OutputField that displays the results.
The Open event for the window initializes the shell object (declared as a property of the window).
mShell.ExecuteMode = Shell.ExecuteModes.Interactive
The user can type a unix command into the TextField, InputField. When they press Return, the following code in the TextField's KeyDown event runs. The Write method sends the command to the Shell's input buffer.
If Not mShell.IsRunning Then
InputField.Value = ""
A Timer calls the ReadAll method in its Action event and displays the output in OutputField: