MONITOR [-d] [-e] [-x] [-c class-name[:>method-name]] variable-name [when-phrase]
set a monitor on a variable [-x: test the hexadecimal value]

MONITOR [-d] [-e] [-c class-name[:>method-name]] {control-name}   {PROP}     property-name [when-phrase]
        {control-handle} {PROPERTY}
        {window-handle}
set a monitor on a property of a screen control or window;

MONITOR [-d] [-e] -env env-name [when-phrase]
set a monitor on a environment variable

[-d: disable the monitor]
[-e: enable the monitor]

WHEN PHRASE specifies a break condition and has the following format:

WHEN {ALWAYS}         
     { { = }  value }
     { { != }
     { { < }
     { { <= }
     { { > }
     { { => }
     
MONITOR -l
list monitors