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 -♦-