Help with Shell

Hello.

I need to be able to receive the commands that another application sends me when I open the other .exe.

For example.

Update.exe

Call Shell("aplication.exe /NOUPDATE", vbNormalFocus)

Aplication.exe

If (Command <> "/NOUPDATE") Then

Call Msgbox("Not Found" & vbcritical)
Exit Sub

Then <= It doesn't work for me.

How could I do it?:confused: