This constant is passed to the textCallBack function to indicate that the text is output generated from the evaluation of a Maple statement.

This constant is passed to the textCallBack function to indicate that the text is diagnostic output, for example high printlevel or trace output.

This constant is passed to the textCallBack function to indicate that the text is from a miscellaneous source, for example the Maple printf function.

This constant is passed to the textCallBack function to indicate that the text is the output of a help request.  For a more comprehensive help facility, see getHelp.

This constant is passed to the textCallBack function to indicate that the text is output generated in response to a quit, done or stop command.

This constant is passed to the textCallBack function to indicate that the text is output from a warning generated during a computation.

This constant is passed to the textCallBack function to indicate that the text is output from an error raised during parsing or evaluating.  This will occur only if the errorCallBack function redirects the error message into the textCallBack function.

This constant is passed to the textCallBack function to indicate that the text is output generated from a kernel status message, (the "bytes used" message").   This will occur only if the statusCallBack function redirects the status messages into the textCallBack function. This is the default behavior when using the EngineCallBacksDefault class.

This constant is passed to the textCallBack function to indicate that the text is output generated from the Maple debugger.

The textCallBack function is called when a text message generated by the kernel should be displayed.

The errorCallBack function is called when an error should be raised to the user.

The statusCallBack function called to report the resource usage (the "bytes used" messages).

The readlineCallBack function is called when Maple requires input from the user.

The redirectCallBack function is called when Maple executes a writeto or appendto.

The callBackCallBack function is called when the function callback is executed in Maple.

The queryInterrupt function is called periodically to see if Maple should interrupt.

The streamCallBack function handles Stream calls.