Wireshark vbscript does not run when using capture filter parameters

Hi,

I'm writing a vbscript to automate wireshark captures using dumpcap.exe, but i've hit a bit of a stumbling block when I try to use a capture filter in the code.

The bit of code below runs and works ok.

Const ForAppending = 8

Set objShell = CreateObject("WScript.Shell")

Set objWshScriptExec = objShell.Exec("C:\Program Files\Wireshark\dumpcap.exe -a duration:15 -w C:\wireshark.pcap")

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When I add a capture filter '-f net 10.44.4.0/23' into the objShell.Exec command parameters, the vbscript runs and then promptly closes without running wireshark.

Const ForAppending = 8

Set objShell = CreateObject("WScript.Shell")

Set objWshScriptExec = objShell.Exec("C:\Program Files\Wireshark\dumpcap.exe -f net 10.44.4.0/23 -a duration:15 -w C:\wireshark.pcap")

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If I run
I'm guessing there's a syntax error in the command and it needs some quotes wrapping around something, but I can't figure out where or what!

If anyone could point me in the right direction that would be great.

Thanks,

Paul