Вызов из Python функций сторонней DLL

typedef long (J2534_API* PTREADMSGS)(unsigned long ChannelID, PASSTHRU_MSG *pMsg, unsigned long *pNumMsgs, unsigned long Timeout);

#pragma pack(push,1)
typedef struct _PASSTHRU_MSG
{
    // Protocol type
    unsigned long ProtocolID;
 
    // Receive message status – See RxStatus in "Message Flags and Status Definition" section
    unsigned long RxStatus;
 
    // Transmit message flags
    unsigned long TxFlags;
 
    // Received message timestamp (microseconds): For the START_OF_FRAME
    // indication, the timestamp is for the start of the first bit of the message. For all other
    // indications and transmit and receive messages, the timestamp is the end of the last
    // bit of the message. For all other error indications, the timestamp is the time the error
    // is detected.
    unsigned long Timestamp;
 
    // Data size in bytes, including header bytes, ID bytes, message data bytes, and extra
    // data, if any.
    unsigned long DataSize;
 
    // Start position of extra data in received message (for example, IFR). The extra data
    // bytes follow the body bytes in the Data array. The index is zero-based. When no
    // extra data bytes are present in the message, ExtraDataIndex shall be set equal to
    // DataSize. Therefore, if DataSize equals ExtraDataIndex, there are no extra data
    // bytes. If ExtraDataIndex=0, then all bytes in the data array are extra bytes.
    unsigned long ExtraDataIndex;
 
    // Start position of extra data in received message (for example, IFR). The extra data
    // bytes follow the body bytes in the Data array. The index is zero-based. When no
    // extra data bytes are present in the message, ExtraDataIndex shall be set equal to
    // DataSize. Therefore, if DataSize equals ExtraDataIndex, there are no extra data
    // bytes. If ExtraDataIndex=0, then all bytes in the data array are extra bytes.
    unsigned char Data[4128];
} PASSTHRU_MSG;
#pragma pack(pop)