引子：昨天在用vb调用vc写的dll文件的时候，变量的使用上出现了问题，通过反编译调试，发现vb中的long才是对应c中的int。而不是integer对应int。
以下是找到的资料：
在本篇中我们重点讲讲Api函数声明中参数列表的部分.
我们知道每种编程语言的数据类型都不尽相同,比如说C中的int和VB中的integer,看名字它们都是整型,但是它们占有的内存单元却是完全不同的.VB中的Integer是占用2个字节的.所以如果某个Api函数原型是C的int型你用Integer去声明它的话,会产生一些意外的错误.正确的做法是用Long去声明它.下面我们例出一些常用的类型转换:
| C语言类型 | VB类型 | Bytes |
| const char* | Long | 4 |
| __int16 | Integer | 2 |
| __int32 | Long | 4 |
| __int64 | Double | 8 |
| __int8 | Byte | 1 |
| bool | Long | 4 |
| float | Single | 4 |
| double | Double | 8 |
| short | Integer | 2 |
| int | Long | 4 |
| char | Byte | 1 |
| unsigned int | Long | 4 |
| char | Byte | 1 |
| unsigned char | Byte | 1 |
| unsigned char | Byte | 1 |
| unsigned short | Integer | 2 |
| unsigned int | Long | 4 |
| VARIANT_BOOL | Integer | 2 |
| wchar_t | Integer | 2 |
| FARPROC | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| LONG | Long | 4 |
| DWORD | Long | 4 |
| WORD | Integer | 2 |
| WORD | Integer | 2 |
| WORD | Integer | 2 |
| WCHAR/BYTE | integer/byte | 2/1 |
| DWORD | Long | 4 |
| unsigned long int | Long | 4 |
| int | Long | 4 |
| unsigned char | Byte | 1 |
| unsigned char | Byte | 1 |
| OLECHAR* | Long | 4 |
| unsigned char | Byte | 1 |
| unsigned char | Byte | 1 |
| DWORD | Long | 4 |
| FARPROC | Long | 4 |
| FARPROC | Long | 4 |
| DWORD | Long | 4 |
| char | Byte | 1 |
| char | Byte | 1 |
| WORD | Integer | 2 |
| long | Long | 4 |
| void* | Long | 4 |
| CMC_sint32 | Long | 4 |
| CMC_uint32 | Long | 4 |
| CMC_uint32 | Long | 4 |
| CMC_uint32 | Long | 4 |
| short | Integer | 2 |
| long int | Long | 4 |
| char | Byte | 1 |
| char* | Long | 4 |
| CMC_uint32 | Long | 4 |
| unsigned short int | Integer | 2 |
| unsigned long int | Long | 4 |
| FARPROC | Long | 4 |
| FARPROC | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| CY | Long | 4 |
| int | Long | 4 |
| DWORD | Long | 4 |
| LONG | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| float | Single | 4 |
| double | Double | 8 |
| FARPROC | Long | 4 |
| FARPROC | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| WORD | Integer | 2 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| CHAR | Byte | 1 |
| DESKTOPENUMPROCA | Long | 4 |
| FARPROC | Long | 4 |
| FARPROC | Long | 4 |
| unsigned int | Long | 4 |
| PVOID | Long | 4 |
| LONG | Long | 4 |
| FARPROC | Long | 4 |
| double | Double | 8 |
| double | Double | 8 |
| DWORD | Long | 4 |
| FARPROC | Long | 4 |
| DWORD | Long | 4 |
| unsigned long | Long | 4 |
| unsigned __int64 | Double | 8 |
| EDITWORDBREAKPROCA | Long | 4 |
| FARPROC | Long | 4 |
| FARPROC | Long | 4 |
| FARPROC | Long | 4 |
| FARPROC | Long | 4 |
| FARPROC | Long | 4 |
| unsigned long | Long | 4 |
| INT | Long | 4 |
| * | Long | 4 |
| BYTE | Byte | 1 |
| int | Long | 4 |
| WORD | Integer | 2 |
| unsigned long | Long | 4 |
| float | Single | 4 |
| float | Single | 4 |
| DWORD | Long | 4 |
| FONTENUMPROCA | Long | 4 |
| FARPROC | Long | 4 |
| FARPROC | Long | 4 |
| ULONG | Long | 4 |
| __int64 | Double | 8 |
| WORD | Integer | 2 |
| void* | Long | 4 |
| long | Long | 4 |
| long | Long | 4 |
| HANDLE | Long | 4 |
| FARPROC | Long | 4 |
| FARPROC | Long | 4 |
| unsigned int | Long | 4 |
| HANDLE | Long | 4 |
| ULONG | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| PVOID | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| ULONG | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| LPVOID | Long | 4 |
| void* | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HICON | Long | 4 |
| void* | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| PVOID | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| DWORD | Long | 4 |
| void* | Long | 4 |
| HANDLE | Long | 4 |
| void* | Long | 4 |
| int | Long | 4 |
| HANDLE | Long | 4 |
| ULONG | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| struct _IMAGELIST NEAR* | Long | 4 |
| DWORD | Long | 4 |
| DWORD | Long | 4 |
| HANDLE | Long | 4 |
| PVOID | Long | 4 |
| HANDLE | Long | 4 |
| LPVOID | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| void* | Long | 4 |
| void* | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| void* | Long | 4 |
| HGLOBAL | Long | 4 |
| FARPROC | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| DWORD | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| DWORD | Long | 4 |
| LONG | Long | 4 |
| HANDLE | Long | 4 |
| ULONG | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| WORD | Integer | 2 |
| PVOID | Long | 4 |
| PVOID | Long | 4 |
| void* | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| struct _TREEITEM FAR* | Long | 4 |
| ULONG | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| HANDLE | Long | 4 |
| __int64 | Double | 8 |
| void* | Long | 4 |
| void* | Long | 4 |
| unsigned short | Integer | 2 |
| int | Long | 4 |
| int | Long | 4 |
| WORD | Integer | 2 |
| ULONG | Long | 4 |
| LONG | Long | 4 |
| int | Long | 4 |
| WORD | Integer | 2 |
| WORD | Integer | 2 |
| LONGLONG | Double | 8 |
| DWORD | Long | 4 |
| LONG | Long | 4 |
| LONG | Long | 4 |
| DWORD | Long | 4 |
| unsigned long | Long | 4 |
| FARPROC | Long | 4 |
| FARPROC | Long | 4 |
| FARPROC | Long | 4 |
| HANDLE | Long | 4 |
| long | Long | 4 |
| long | Long | 4 |
| long double | Double | 8 |
| long | Long | 4 |
| __int64 | Double | 8 |
| hyper | Double | 8 |
| long | Long | 4 |
| IAuthenticate* | Long | 4 |
| IBindCtx* | Long | 4 |
| union tagBINDPTR* | Long | 4 |
| BOOL* | Long | 4 |
| LPRECT | Long | 4 |
| unsigned char* | Long | 4 |
| LPCRECT | Long | 4 |
| const CHAR* | Long | 4 |
| const DLGTEMPLATE* | Long | 4 |
| const DLGTEMPLATE* | Long | 4 |
| const FOLDERSETTINGS* | Long | 4 |
| CHAR* | Long | 4 |
| const IID* | Long | 4 |
| const ITEMIDLIST* | Long | 4 |
| CLSID* | Long | 4 |
| MENUITEMINFOA const* | Long | 4 |
| MENUITEMINFOW const* | Long | 4 |
| const MMCKINFO* | Long | 4 |
| const MMIOINFO* | Long | 4 |
| const OLECHAR* | Long | 4 |
| DWORD* | Long | 4 |
| const PROPSHEETHEADERA* | Long | 4 |
| const PROPSHEETHEADERW* | Long | 4 |
| const PROPSHEETPAGEA* | Long | 4 |
| const PROPSHEETPAGEW* | Long | 4 |
| REBARBANDINFOA const* | Long | 4 |
| REBARBANDINFOW const* | Long | 4 |
| const RECT* | Long | 4 |
| const RECTL* | Long | 4 |
| PRTL_CRITICAL_SECTION | Long | 4 |
| SCROLLINFO const* | Long | 4 |
| const SHITEMID* | Long | 4 |
| const CHAR* | Long | 4 |
| const TBBUTTON* | Long | 4 |
| const TCHAR* | Long | 4 |
| const void* | Long | 4 |
| const WAVEFORMATEX* | Long | 4 |
| const WCHAR* | Long | 4 |
| const WCHAR* | Long | 4 |
| DWORD* | Long | 4 |
| DWORD* | Long | 4 |
| DWORD* | Long | 4 |
| D3DCOLORMODEL* | Long | 4 |
| DWORD* | Long | 4 |
| DWORD* | Long | 4 |
| DWORD* | Long | 4 |
| float* | Long | 4 |
| DESC_CHAR* | Long | 4 |
| DLGITEMTEMPLATE* | Long | 4 |
| DLGITEMTEMPLATE* | Long | 4 |
| DLGTEMPLATE* | Long | 4 |
| DLGTEMPLATE* | Long | 4 |
| DWORD* | Long | 4 |
| DWORD* | Long | 4 |
| SBinaryArray* | Long | 4 |
| IEnumCATEGORYINFO* | Long | 4 |
| PFIBER_START_ROUTINE | Long | 4 |
| FMTID* | Long | 4 |
| ACCELERATEABSDI* | Long | 4 |
| DISMISSMODELESS* | Long | 4 |
| long* | Long | 4 |
| long* | Long | 4 |
| GUID* | Long | 4 |
| HANDLE* | Long | 4 |
| IID* | Long | 4 |
| int* | Long | 4 |
| WORD* | Long | 4 |
| unsigned long* | Long | 4 |
| long* | Long | 4 |
| VOID** | Long | 4 |
| PVOID | Long | 4 |
| PVOID | Long | 4 |
| DWORD* | Long | 4 |
| NMSELCHANGE* | Long | 4 |
| OLECHAR* | Long | 4 |
| WORD* | Long | 4 |
| const char** | Long | 4 |
| LPMAPIFORMINFO* | Long | 4 |
| SIZE* | Long | 4 |
| CHAR* | Long | 4 |
| IStream* | Long | 4 |
| LPSTR | Long | 4 |
| PTHREAD_START_ROUTINE | Long | 4 |
| LPSTR | Long | 4 |
| unsigned long* | Long | 4 |
| VARIANT* | Long | 4 |
| LPBYTE | Long | 4 |
| void* | Long | 4 |
| WCHAR* | Long | 4 |
| WORD* | Long | 4 |
| WCHAR* | Long | 4 |
| LONG | Long | 4 |
| unsigned long | Long | 4 |
| DWORD | Long | 4 |
| long | Long | 4 |
| unsigned long | Long | 4 |
| char | Byte | 1 |
| unsigned long | Long | 4 |
| LARGE_INTEGER | Double | 8 |
| int | Long | 4 |
| DISPID | Long | 4 |
| double | Double | 8 |
| DWORD | Long | 4 |
| FARPROC | Long | 4 |
| FARPROC | Long | 4 |
| void* | Long | 4 |
| CHAR* | Long | 4 |
| LONG | Long | 4 |
| WCHAR* | Long | 4 |
| long | Long | 4 |
| FARPROC | Long | 4 |
| VARIANT_BOOL | Integer | 2 |
| DWORD | Long | 4 |
| VARIANT_BOOL | Integer | 2 |
| UINT | Long | 4 |
| VARIANT_BOOL | Integer | 2 |
| float | Single | 4 |
| LONG | Long | 4 |
| long | Long | 4 |
| float | Single | 4 |
| LONG | Long | 4 |
| long | Long | 4 |
| float | Single | 4 |
| LONG | Long | 4 |
| long | Long | 4 |
| float | Single | 4 |
| LONG | Long | 4 |
| long | Long | 4 |
| WCHAR | Integer | 2 |
| ACL* | Long | 4 |
| WORD | Integer | 2 |
| IAVIEditStream* | Long | 4 |
| IAVIFile* | Long | 4 |
| IAVIStream* | Long | 4 |
| IAVIStreaming* | Long | 4 |
| WORD* | Long | 4 |
| BOOL* | Long | 4 |
| BOOLEAN* | Long | 4 |
| BYTE* | Long | 4 |
| const CHAR* | Long | 4 |
| COMBOBoxEXITEMA const* | Long | 4 |
| COMBOBoxEXITEMW const* | Long | 4 |
| CHAR* | Long | 4 |
| CHAR* | Long | 4 |
| const IUniformResourceLocatorA* | Long | 4 |
| IConnectionPoint* | Long | 4 |
| IConnectionPointContainer* | Long | 4 |
| PRTL_CRITICAL_SECTION | Long | 4 |
| const CHAR* | Long | 4 |
| char* | Long | 4 |
| const URLINVOKECOMMANDINFOA* | Long | 4 |
| const URLINVOKECOMMANDINFOW* | Long | 4 |
| const WCHAR* | Long | 4 |
| const WCHAR* | Long | 4 |
| LONG | Long | 4 |
| DLGITEMTEMPLATE* | Long | 4 |
| DLGITEMTEMPLATE* | Long | 4 |
| DWORD* | Long | 4 |
| DWORDLONG* | Long | 4 |
| IEnumConnectionPoints* | Long | 4 |
| IEnumConnections* | Long | 4 |
| FLOAT* | Long | 4 |
| const unsigned char* | Long | 4 |
| IGetFrame* | Long | 4 |
| HANDLE* | Long | 4 |
| HKEY* | Long | 4 |
| int* | Long | 4 |
| IUniformResourceLocatorA* | Long | 4 |
| LARGE_INTEGER* | Long | 4 |
| PDWORD | Long | 4 |
| long* | Long | 4 |
| LONGLONG* | Long | 4 |
| LUID* | Long | 4 |
| const MIDL_STUB_DESC* | Long | 4 |
| void* | Long | 4 |
| LONG* | Long | 4 |
| WORD | Integer | 2 |
| PROPENUMPROCA | Long | 4 |
| FARPROC | Long | 4 |
| PROPENUMPROCEXA | Long | 4 |
| FARPROC | Long | 4 |
| FARPROC | Long | 4 |
| FARPROC | Long | 4 |
| ULONG | Long | 4 |
| SCODE* | Long | 4 |
| WORD* | Long | 4 |
| DWORD* | Long | 4 |
| SHORT* | Long | 4 |
| PVOID | Long | 4 |
| SIZE* | Long | 4 |
| CHAR* | Long | 4 |
| char* | Long | 4 |
| unsigned char* | Long | 4 |
| LPSTR | Long | 4 |
| char* | Long | 4 |
| void* | Long | 4 |
| int | Long | 4 |
| LPSTR | Long | 4 |
| UCHAR* | Long | 4 |
| unsigned int* | Long | 4 |
| ULONG* | Long | 4 |
| ULONGLONG* | Long | 4 |
| USHORT* | Long | 4 |
| void* | Long | 4 |
| WCHAR* | Long | 4 |
| WCHAR* | Long | 4 |
| WORD* | Long | 4 |
| WSH_NBP_NAME* | Long | 4 |
| WSH_NBP_NAME* | Long | 4 |
| WSH_NBP_NAME* | Long | 4 |
| WCHAR* | Long | 4 |
| CLSID* | Long | 4 |
| FMTID* | Long | 4 |
| GUID* | Long | 4 |
| IID* | Long | 4 |
| ACCESS_MASK | Long | 4 |
| DWORD | Long | 4 |
| short | Integer | 2 |
| void* | Long | 4 |
| void* | Long | 4 |
| I_RPC_HANDLE | Long | 4 |
| unsigned char* | Long | 4 |
| I_RPC_HANDLE* | Long | 4 |
| void* | Long | 4 |
| unsigned long | Long | 4 |
| void* | Long | 4 |
| void* | Long | 4 |
| long | Long | 4 |
| unsigned long | Long | 4 |
| HANDLE | Long | 4 |
| LPVOID | Long | 4 |
| char | Byte | 1 |
| long | Long | 4 |
| DWORD | Long | 4 |
| double | Double | 8 |
| long int | Long | 4 |
| WORD | Integer | 2 |
| DWORD | Long | 4 |
| FARPROC | Long | 4 |
| DWORD | Long | 4 |
| float | Single | 4 |
| short | Integer | 2 |
| short | Integer | 2 |
| short | Integer | 2 |
| int | Long | 4 |
| signed char | Byte | 1 |
| int | Long | 4 |
| long | Long | 4 |
| short | Integer | 2 |
| unsigned int | Long | 4 |
| signed long | Long | 4 |
| long | Long | 4 |
| OLECHAR** | Long | 4 |
| u_int | Long | 4 |
| HANDLE* | Long | 4 |
| __int64 | Double | 8 |
| unsigned char | Byte | 1 |
| unsigned char | Byte | 1 |
| unsigned char | Byte | 1 |
| double | Double | 8 |
| double | Double | 8 |
| void* | Long | 4 |
| sqlHANDLE | Long | 4 |
| sqlHANDLE | Long | 4 |
| sqlHANDLE | Long | 4 |
| sqlHANDLE | Long | 4 |
| HWND | Long | 4 |
| long | Long | 4 |
| unsigned char | Byte | 1 |
| void* | Long | 4 |
| float | Single | 4 |
| sqlSMALLINT | Integer | 2 |
| char | Byte | 1 |
| short | Integer | 2 |
| sqlCHAR | Byte | 1 |
| unsigned char | Byte | 1 |
| unsigned char | Byte | 1 |
| unsigned __int64 | Double | 8 |
| unsigned long | Long | 4 |
| unsigned short | Integer | 2 |
| unsigned char | Byte | 1 |
| wchar_t | Integer | 2 |
| short | Integer | 2 |
| long | Long | 4 |
| long | Long | 4 |
| DWORD | Long | 4 |
| short int | Integer | 2 |
| short int | Integer | 2 |
| TCHAR | Byte/Integer | 1/2 |
| TCHAR | Byte/Integer | 1/2 |
| long | Long | 4 |
| FARPROC | Long | 4 |
| FARPROC | Long | 4 |
| FARPROC | Long | 4 |
| WORD | Integer | 2 |
| unsigned char | Byte | 1 |
| unsigned int | Long | 4 |
| unsigned long | Long | 4 |
| unsigned short | Integer | 2 |
| unsigned char | Byte | 1 |
| unsigned long int | Long | 4 |
| unsigned long int | Long | 4 |
| unsigned int | Long | 4 |
| unsigned long | Long | 4 |
| unsigned long | Long | 4 |
| unsigned __int64 | Double | 8 |
| unsigned char | Byte | 1 |
| unsigned int | Long | 4 |
| unsigned long | Long | 4 |
| unsigned short | Integer | 2 |
| BYTE_BLOB* | Long | 4 |
| DWORD_BLOB* | Long | 4 |
| FLAGGED_BYTE_BLOB* | Long | 4 |
| FLAGGED_WORD_BLOB* | Long | 4 |
| WORD_BLOB* | Long | 4 |
| unsigned short | Integer | 2 |
| unsigned short | Integer | 2 |
| LONGLONG | Double | 8 |
| unsigned short int | Integer | 2 |
| unsigned short int | Integer | 2 |
| char* | Long | 4 |
| VARIANT | Variant | |
| short | Integer | 2 |
| VARIANT | Variant | |
| unsigned short | Integer | 2 |
| void* | Long | 4 |
| wchar_t | Integer | 2 |
| unsigned short | Integer | 2 |
| wchar_t | Integer | 2 |
| wchar_t | Integer | 2 |
| LPVOID | Long | 4 |
| FARPROC | Long | 4 |
| FARPROC | Long | 4 |
| wchar_t | Integer | 2 |
| userSTGMEDIUM* | Long | 4 |
| FLAGGED_WORD_BLOB* | Long | 4 |
| userCLIPFORMAT* | Long | 4 |
| userFLAG_STGMEDIUM* | Long | 4 |
| RemotableHandle* | Long | 4 |
| userHBITMAP* | Long | 4 |
| RemotableHandle* | Long | 4 |
| RemotableHandle* | Long | 4 |
| userHENHMetaFILE* | Long | 4 |
| RemotableHandle* | Long | 4 |
| userHGLOBAL* | Long | 4 |
| RemotableHandle* | Long | 4 |
| RemotableHandle* | Long | 4 |
| userHMetaFILE* | Long | 4 |
| userHMetaFILEPICT* | Long | 4 |
| userHPALETTE* | Long | 4 |
| RemotableHandle* | Long | 4 |
| RemSNB* | Long | 4 |
| userSTGMEDIUM* | Long | 4 |
| FARPROC | Long | 4 |
| * | Long | 4 |
| unsigned short | Integer | 2 |
| UINT | Long | 4 |
| DWORD | Long | 4 |
对于指针型的类型转入到Vb中应是ByRef的.其它的用ByVal,对于某些函数回调,需要用Addressof取函数地址,要注意的是要取地址的函数必需在模块文件中.否则会出错.
本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/littlerain007/archive/2005/03/22/326569.aspx