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vb调用vc写的dll文件的时候，变量类型的对应关系

发布时间：2020-12-16 23:07:51 所属栏目：大数据 来源：网络整理
导读：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

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

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