winzip command line

I use a winzip shell command with this parameter:

-min -a

2 question:

1) how to intercept when the zipping operation is terminate?
2) is possoble to hide the icon of winzip when the code process the file?


note:
i loop a all files in dir "one to one" and zip this files (i have approx 40 file in dir) during the code of compression in taskbar appoer and disapper the winzip icon with the progressbar process.... i think tath not is good