> ___-----------            ------------
 > ---------------------
 > | key press? |------>-----| hot-key? |----->-----| yes -
 > activate TSR|
 > ___-----------            ------------
 > ---------------------
 >       |                        |
 >       ^                        |
 >       |                   -------------
 >       `----<-------<------| no - exit | (back to old handler
 > down chain)
 >                           -------------
But when the hot-key is pressed and pass the command to the program
How does other resident programs continue been executed in background?
---
---------------