Mouse Position Hook

// MouseHookDll.cpp : Defines the entry point for the DLL application. // #include <windows.h> #include <stdio.h> #include "MouseHookDll.h" #pragma data_seg("mydata") HWND glhDisplayWnd=NULL; //显示目标窗口标题编辑框的句柄 HHOOK glhHook=NULL; //安装的鼠标勾子句柄 HINSTANCE glhInstance=NULL; //DLL实例句柄 #pragma data_seg() LRESULT WINAPI MouseProc(int nCode,WPARAM wparam,LPARAM lparam); extern "C" int APIENTRY DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved) { // Remove this if you use lpReserved UNREFERENCED_PARAMETER(lpReserved); if (dwReason == DLL_PROCESS_ATTACH) { glhInstance=hInstance;//插入保存DLL实例句柄 } else if (dwReason == DLL_PROCESS_DETACH) { glhInstance=NULL; } return 1; // ok } Cmousehook::Cmousehook() { } Cmousehook::~Cmousehook() { stophook(); } BOOL Cmousehook::starthook(HWND hWnd) { BOOL bResult=FALSE; glhHook=SetWindowsHookEx(WH_MOUSE_LL,MouseProc,glhInstance,0); if(glhHook!=NULL) bResult=TRUE; glhDisplayWnd=hWnd; return bResult; } BOOL Cmousehook::stophook() { BOOL bResult=FALSE; if(glhHook) bResult= UnhookWindowsHookEx(glhHook); if(bResult) { glhDisplayWnd=NULL; glhHook=NULL; } return bResult; } LRESULT WINAPI MouseProc(int nCode,WPARAM wparam,LPARAM lparam) { LPMOUSEHOOKSTRUCT pMouseHook=(MOUSEHOOKSTRUCT FAR *)lparam; if (nCode>=0) { POINT point; char szCaption[100] ; GetCursorPos(&point); sprintf(szCaption,"%d,%d",point.x,point.y); SendMessage(glhDisplayWnd,WM_SETTEXT,0,(LPARAM)(LPCTSTR)szCaption); } return CallNextHookEx(glhHook,nCode,wparam,lparam);//继续传递消息 }