Two methods of DLL programming export interface

Preface:

There are two ways to get around a DLL in a VC:

The first is to define a def file through a module , put the function interface to be exported, and the DEF file provides the linker with information about the program's everywhere, attributes, and so on.

The second type: Add __declspec (dllexport) to the function declaration;

Example of the first method:

First build a DLL project named: Mousehook_dll:

In the HookLoad.h species declaration two interface functions:

#pragma  oncebool   Starthookev (HWND hwnd); void    stophookev (void);

To implement a function about an interface in HookLoad.cpp:

BOOL   Starthookev (hwnd hwnd)  {  G_hwnd =hwnd;g_keyboradhook = SetWindowsHookEx (Wh_keyboard, Keyboardproc, Getmodulehandlea ("Mousehook_dll"), 0); return FALSE;}  void   Stophookev (void)  {  UnhookWindowsHookEx (g_keyboradhook);}  

In the Mousehook_dll.def:

LIBRARY mousehook_dllexportsstarthookev@2stophookev@3

This makes it possible toThe two function interfaces in Mousehook_dll.dll are exported;

Example of the second method:

First build a DLL project named: Mousehook_dll:

In the HookLoad.h species declaration two interface functions:

#pragma  once#ifndef dll_implement#define  dll_api _declspec (dllexport) #else # define  dll_api _declspec ( dllexport) #endifBOOL   DLL_API Starthookev (HWND hwnd); void    Dll_api stophookev (void);

In the implementation of HookLoad.cpp:

BOOL  DLL_API Starthookev (hwnd hwnd)  {  G_hwnd =hwnd;g_keyboradhook = SetWindowsHookEx (Wh_keyboard, Keyboardproc, Getmodulehandlea ("Mousehook_dll"), 0); return FALSE;}  void  Dll_api stophookev (void)  {  UnhookWindowsHookEx (g_keyboradhook);}

This allows you to export Starthookev and Stophookevtwo functions, this way does not require a module-defined. def file.

Hope is useful to everyone.

Two methods of DLL programming export interface