`TIODescriptor`
pt	ro	OwnerProcess
pt		PipeBufferSize
pt	ro	OurHandle
pt	ro	HandleValid
pt		CloseHandleOnExecute
	ro	ProcessHandleType
		CustomHandle
		AutoCloseCustomHandle
		CustomHandleIsInheritable
pl		IOType
pl		FileName
pl		AfterAllocateHandle
pl		Process
pl		FileWriteMode