User`s guide

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unrecord session1 [, session2 ... ]
Turns off the specified recording session(s) and closes the
file(s) involved.
unrecord all Turns off all recording sessions and closes all files involved.
unset var Removes the specified dbx variable.
up [num] Moves up the specified number of activation levels in the
stack. The default is one level.
use [dir ...] If you provide one or more directories, dbx replaces the
source directory list with the directories that you provide.
If you do not provide any directories, dbx displays the
current source directory list.
wait Waits for the active process to stop for an event.
wait pid pid Waits for the process pid to stop for an event.
waitall Waits for any process currently running to breakpoint or
stop for any reason.
whatis variable Prints the type declaration for the specified variable or
procedure.
when [expression|variable] {command-list}
Inspects the value before executing each source line. If it has
changed, executes the command list.
If the expression is of type pointer, look at the data pointed
to and watch until it changes. If the expression is not of type
pointer, look at the 32 bits at that address (assume the
expression evaluates to an address).
when [expression|variable] at line {command-list}
Inspects the value at the given source line. If it has changed,
executes the command list.
If the expression is of type pointer, look at the data pointed
to and watch until it changes. If the expression is not of type
pointer, look at the 32 bits at that address (assume the
expression evaluates to an address).