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void DecodeStream£¨unsigned char * szBuffer, unsigned char *szKey, unsigned
long dwKeyLen£©;
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FileKey = "1234567890ABCDEF"
hFileIn = open(DataFile, "rb")
BinaryContent = hFileIn.read()
BufLen = BinaryContent
szBuf = [c_byte]*BufLen
szBuf = struct.unpack('s'*BufLen, BinaryContent)

try:
    DecodeBuf = cdll.LoadLibrary("Cipher.dll").DecodeStream
    #cdecl way to call function
    DecodeBuf .argtypes = [POINTER(c_byte), c_int, c_char_p, c_int]
    res = DecodeBuf (szBuf, c_int(BufLen), c_char_p(FileKey), c_int(0x104))
    if res == 1:
        print szBuf
except WindowsError:
        print "Fail to Load Cipher.dll\n"
print "Fail to Decode"

Èç¹û°´ÕâÑùд¾Í»áÌáʾ:
Traceback (most recent call last):
  File "C:\123.py", line 51, in ?
    res = DecodeBuf (szBuf, c_int(BufLen), c_char_p(FileKey), c_int(0x104))
ctypes.ArgumentError: argument 1: exceptions.TypeError: Don't know how to
convert parameter 1

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