I know you can suspend and resume processes not created with the Win32::Process module. I've done it in the past using WMI. I can't see any OpenProcess method with the Win32::Process module, and I get this error if I try ant use it:

Your vendor has not defined Win32::Process macro OpenProcess
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Update: it looks like OpenProcess() is a Win32 API and isn't implimented in Win32::Process. So my original statement stands - the Suspend() and Resume() methods will work only on processes created with Win32::Process::Create(). If you want to suspend a process that isn't create with that module, then you'll have to use WMI or the Win32 API.

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