ALTD()
 Invoke The CA-Clipper Debugger
------------------------------------------------------------------------------
 Syntax

     ALTD([<nAction>]) --> NIL

 Arguments

     <nAction> defines what action ALTD() performs when invoked.  The
     following is a complete list of <nAction> values and their actions:

     ALTD() Actions
     ------------------------------------------------------------------------
     Argument     Action
     ------------------------------------------------------------------------
     None         Invokes the Debugger if it is enabled
     0            Disables Alt-D
     1            Enables Alt-D
     Other        No action
     ------------------------------------------------------------------------

 Returns

     ALTD() always returns NIL.

 Description

     ALTD() performs differently depending on its argument as shown in the
     table above.  For more information on using the Debugger, refer to The
     CA-Clipper Debugger chapter in the Programming and Utilities guide.

 Examples

     .  This example demonstrates a series of manifest constants that
        can be used as arguments for ALTD() before invoking the debugger
        programmatically:

        #define ALTD_DISABLE   0
        #define ALTD_ENABLE    1
        //
        ALTD(ALTD_ENABLE)

 Files:  Library is CLIPPER.LIB.