Function            DoubleDOSTaskSwitch - set Double DOS task
                                              switching on/off

  Syntax              void DoubleDOSTaskSwitch(boolean on);

  Prototype in        multihk.h

  Remarks             sets Double DOS task switching on or off.

  Return value        nothing.

  See also            DoubleDOSfreeCPU(), DoubleDOSGetVirtual(),
                      isDoubleDOS(), isInvisible()

  Example             #include <multihk.h>

                      #define ENABLE      TRUE

                      main()
                      {
                           DoubleDOSTaskSwitch(ENABLE);
                      }