how to notify external program to know the current mode of Vim efficient ?

I write the code below to call a external program, but a cmd window will show out when the command execuated.

So I want to know show to hide the cmd window when execuate them?

au InsertEnter * :silent execute '!VimModeRecord.exe'
au InsertLeave * :silent execute '!VimModeRecord.exe'

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