The data area passed to a system call is too small

Hi all,

I'm trying to create an app that will process several files at once,
dropped onto its icon in Explorer. But if I drop too many files at
once (e.g. > ~30 files, which equates to 2048 bytes of command line
args), the app isn't even launched and I get an alert box saying "The
data area passed to a system call is too small".

Now I know of several apps that can accept a huge amount of files
dropped on them, like for instance Winrar.

Is there a trick to increase the internal buffer size for the command
line args ?

Michel