vb调用vc写的dll文件的时候，变量类型的对应关系

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.

本文来自优快云博客，转载请标明出处：http://blog.youkuaiyun.com/littlerain007/archive/2005/03/22/326569.aspx