GPDL $DEBUG

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   $DEBUG (debugFlags)

Return value: The old debug flags...so you can put things back the way they were.

Use the $DEBUG function to turn debug capabilities on/off.

Bit 0 = DBG_messageBox

Causes a Windows message box to appear when certain errors such as improper $GREP search strings are encountered at runtime.

Bit 1 = DBG_functionTrace

Causes a log message to be created in the GPDL log file whenever a user function is called or returns. This log entry records the parameters and return value.