Why don't you get the system to check for a file that you know exists on drive Z:?

EG

if not directory("Z:\known folder\known file.txt")


>Dear Experts
>
>I connect map network mannually as
>
>My computer --> Map Network Drive --> ..........
>
>
>I use following commands to check whether network drive is connected or not
>
>

>if not directory("Z:\")
>	messagebox("No Network Connection",0+16+256,"Accounts System")
>	clear events
>	quit
>else
>	messagebox("Network Connection Exists",0+16+256,"Accounts System")
>Endif
>

>
>After this Z drive is shown with other Hard Disks.
>
>Sometimes it says:
>

>	messagebox("No Network Connection",0+16+256,"Accounts System")
>

>
>But Z drive is still exists in my computer.
>
>Then I disconnect Map Network Drive and connect again
>
>Ater this I following messages is displayed
>
>

>messagebox("No Network Connection",0+16+256,"Accounts System")
>

>
>Why to repeat this again and again?
>
>I think the problem is in this line
>
>

>if not directory("Z:\")
>

>
>I want to ask, is there any other command to check network drive connection?
>
>
>Please help