Switcher API

               See Switcher API Overview for background information.

 █▌Switcher API▐█  INT 2fH 4B01H  Build Notification Chain
                   INT 2fH 4B02H  Is Switcher Installed? / Get Service Addr
                   INT 2fH 4B03H  Allocate Switcher ID
                   INT 2fH 4B04H  Free Switcher ID
                   INT 2fH 4B05H  Identify Instance Data

     █▌Services▐█  SwSrvcFn 0000H Get Switcher Version
                   SwSrvcFn 0001H Test Memory Region
                   SwSrvcFn 0002H Suspend Switcher
                   SwSrvcFn 0003H Resume Switcher
                   SwSrvcFn 0004H Hook Notification Chain
                   SwSrvcFn 0005H Unhook Notification Chain
                   SwSrvcFn 0006H Query API Support

█▌Notifications▐█  SwNtfyFn 0000H A Switcher Is Being Initialized
                   SwNtfyFn 0001H Can Switcher Please Suspend Your Session?
                   SwNtfyFn 0002H Switcher Is Suspending Your Session
                   SwNtfyFn 0003H Switcher Is Activating Your Session
                   SwNtfyFn 0004H Session Is Now Active
                   SwNtfyFn 0005H Switcher Is Creating a Session
                   SwNtfyFn 0006H Switcher Is Destroying a Session
                   SwNtfyFn 0007H Switcher Is Exiting

   █▌Structures▐█  SwApiInfoRec
                   SwCallbackInfoRec
                   SwStartupInfoRec
                   SwInstanceItemRec
                   SwVersionRec

See Also: Switcher API Overview
          INT 2fH
          DOS Functions
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