Virtual Devices (3.1) (vdag31qh.hlp) (Table of Contents; Topic list)
I/O Trapping Services
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Disable_Global_Trapping   Disables global I/O trapping
Disable_Local_Trapping    Disables local I/O trapping
Enable_Global_Trapping    Enables global I/O trapping
Enable_Local_Trapping     Enables local I/O trapping
Install_IO_Handler        Install an I/O callback procedure
Install_Mult_IO_Handlers  Install I/O handlers for multiple ports
Simulate_IO               Simulates input and output