>Some one can help me to understand what dows this command doing exactly?
>Thank you

Chaim,

In runtime it suspends/stops/halts execution of the programs at that statement and allows the user to select things from the menu, eg forms

If you do a clear events, it resumes program execution from where the read events stopped

&& eg : main program
&& open database
&& build menu

read events && user can now select items from menu, program is suspended here

&& add a clear events to some menu option
&& program will resume here

&& close database
quit