I'm trying to learn ctypes so I figured I'd reproduce something I did earlier with pywin32 but it seems I fail it. I'm sure I'm missing something here
PdhMakeCounterPath Doc on msdn: http://msdn.microsoft.com/en-us/library/aa372649%28VS.85%29.aspx [code] from ctypes import * from ctypes.wintypes import * pdh = windll.pdh class PDH_COUNTER_PATH_ELEMENTS_A(Structure): _fields_ = [("szMachineName",LPSTR), ("szObjectName",LPSTR), ("szInstanceName", LPSTR), ("szParentInstance",LPSTR), ("dwInstanceIndex", DWORD), ("szCounterName",LPSTR)] pCounterPathElements = PDH_COUNTER_PATH_ELEMENTS_A(LPSTR(None), LPSTR('Network Interface'), LPSTR("Realtek RTL8168C[P]_8111C[P] Family PCI-E GBE NIC") , LPSTR(None), DWORD(-1), LPSTR("Bytes Received/sec")) szFullPathBuffer = LPCSTR(0) pcchbufferSize = DWORD(0) dwFlags = DWORD(0) result = pdh.PdhMakeCounterPathA(pCounterPathElements, pointer(szFullPathBuffer), pointer(pcchbufferSize), dwFlags) #szFullPathBuffer = create_string_buffer(pcchbufferSize.value) #result = pdh.PdhMakeCounterPathA(pCounterPathElements, # pointer(szFullPathBuffer), # pointer(pcchbufferSize), dwFlags) [/code] this is where I am stuck: >>> result -2147481646 or 0x800007d2L Which is PDH_MORE_DATA but pcchbufferSize does not change (i'm pretty sure it's supposed to be updated with the correct amount to allocate for szFullPathBuffer) and upon running the function again python freezes and windows kills it (probably access violation?). -- -steve
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