windows-hook-demo

======================================================================== DYNAMIC LINK LIBRARY : CppHookDll Project Overview ======================================================================== ///////////////////////////////////////////////////////////////////////////// Use: This sample Win32 DLL exports the hook data and methods that is used by the CppWindowsHook project. ///////////////////////////////////////////////////////////////////////////// Project Relation: CppWindowsHook -> CppHookDll CppHookDll posts a private message(WM_KEYSTROKE or WM_KEYINPUT) to CppWindowsHook's main window(CppWindowsHookDlg).WM_KEYINPUT is sent when a real key is stroked. ///////////////////////////////////////////////////////////////////////////// Creation: A. Creating the project Step1. Create a Visual C++ / Win32 / Win32 Project named CppHookDll in Visual Studio 2008. Step2. In the page "Application Settings" of Win32 Application Wizard, select Application type as DLL, and check the Export symbols checkbox. Click Finish. B. Exporting symbols from a DLL using .DEF files Step1. Declare the data, methods to be exported in the header file. Define them in the corresponding .cpp file. Step2. Add a .DEF file named HookDll.def to the project. Modify the .DEF file based on this skeleton Step3. In order that the DLL project recognizes the existence of the .DEF file, right-click the project and open its Properties dialog. In the page Linker / Input, set the value of Module Definition File (/DEF:) to be HookDll.DEF. C. Exporting symbols from a DLL using __declspec(dllexport) Step1. Create the following #ifdef block in the header file to make exporting & importing from a DLL simpler. (This should be automatically added if we check the Export symbols checkbox when creating the project.) #ifdef HOOKDLL_EXPORTS #define HOOKDLL_API __declspec(dllexport) #else #define HOOKDLL_API __declspec(dllimport) #endif Step2. Add SYMBOL_DECLSPEC to the left of the calling-convention keyword of the symbols to be exported with __declspec(dllexport). For example, BOOL HOOKDLL_API WINAPI SetKeyboardHook(BOOL bInstall, DWORD dwThreadId = 0, HWND hWndCaller = NULL); ///////////////////////////////////////////////////////////////////////////// References: Exporting from a DLL http://msdn.microsoft.com/en-us/library/z4zxe9k8.aspx Exporting from a DLL Using DEF Files http://msdn.microsoft.com/en-us/library/d91k01sh.aspx Module-Definition (.def) Files http://msdn.microsoft.com/en-us/library/28d6s79h.aspx Exporting from a DLL Using __declspec(dllexport) http://msdn.microsoft.com/en-us/library/a90k134d.aspx Creating and Using a Dynamic Link Library (C++) http://msdn.microsoft.com/en-us/library/ms235636.aspx HOWTO: How To Export Data from a DLL or an Application http://support.microsoft.com/kb/90530 Dynamic-link library http://en.wikipedia.org/wiki/Dynamic_link_library Stdcall and DLL tools of MSVC and MinGW http://wyw.dcweb.cn/stdcall.htm A Crash Course In Exporting From A DLL http://home.hiwaay.net/~georgech/WhitePapers/Exporting/Exp.htm /////////////////////////////////////////////////////////////////////////////