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현재 C에서 작성된 DLL인데, Visual Studio 2010의 VB에서 사용해야하는데 어떻게 해야하나요?

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■ C DLL작성시 선언된 부분

typedef long   X_CONTENT;

typedef struct {
     int             USER_ID;
     char          USER_NAME[31];
     int             USER_PRIVIEGE;
     char          USER_ENABLED;
} HEADER;

typedef struct {
     HEADER  INFO;
     int           LEN;
     char        PHOTO[30*1024];
} USER_INFO;

typedef struct {
     char          NUMBER;
     int             DATA_LEN;
     char          DATA[30*1024];
} OBJECT_DATA;

 

typedef void (__stdcall *TDisconnectCallback)(void* ctx, const char state);
typedef void (__stdcall *TBroadcastCallback)(void* ctx, const char* devID, const char* data, const char broadcastType);

#ifdef DLL_API_EXPORTS
     #define API __declspec(dllexport)
#else
     #define API __declspec(dllimport)
#endif

#ifdef __cplusplus
extern "C" {
#endif

API int __stdcall GetUserInfo(X_CONTEXT session, const char* ID, const int userID, USER_INFO* info, OBJECT_DATA obj[], int* Count);

API int __stdcall _GetUserIDList(X_CONTEXT session, const char* devID, int userIDList[], int* count);
API int __stdcall DisconnectCallback(X_CONTEXT session, TDisconnectCallback callback, void* ctx);
API int __stdcall BroadcastCallback(X_CONTEXT session, TBroadcastCallback callback, void* ctx);

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위에 대해 VS2010 VB에서 아래와 같이 선언했는데, 오류가 나고, CallBack에 대해 어떻게 처리해야 되는지 회답좀 부탁드립니다.

■ VB에 작성된 부분

    Class HEADER_CLASS
        Public USER_ID As Long
        Public USER_NAME(31) As Byte
        Public USER_PRIVILEGE As Long
        Public USER_ENABLED As Byte
    End Class

    Class USER_INFO_CLASS
        Public INFO As HEADER_CLASS
        Public PHOTO_LEN As Long
        Public PHOTO(30 * 1024) As Byte
    End Class

    Class OBJECT_DATA_CLASEE
        Public NUMBER As Char
        Public DATA_LEN As Integer
        Public DATA(30*1024) As Char
    End Class

Declare Function GetUserIDList Lib "X.dll" Alias "GetUserIDList" (ByVal session As Long, ByRef devID As String, ByRef userIDList() As Integer, ByRef count As Integer) As Integer

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■ 실행문

Dim gSession as Long

 

Dim gStatus as Integer

Dim icount As Integer
Dim UserID(100) As Integer
Dim vDevID As String = "E66668185B32A835"

 gStatus = GetUserIDList(gSession, vDevID, UserID(1), icount)

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위와 같이 하면

이런 오류가 발생합니다.

이에 자료가 어디가 잘못됬는지 확인 부탁드립니다.

그리고, CallBack함수를 사용해야 하는데, 어떻게 선언해야 할지 몰라서요~

typedef void (__stdcall *TDisconnectCallback)(void* ctx, const char state);
typedef void (__stdcall *TBroadcastCallback)(void* ctx, const char* devID, const char* data, const char broadcastType);

이에 대한 부분좀 부탁드립니다.

좋은 하루되세요!