Mã:
#include "windows.h" typedef VOID(*LOADPROC)(HHOOK hHook); HWND hWindow;HINSTANCE hInst;HHOOK hHook;BOOL setHook();BOOL unHook(HHOOK hHook); enum { ID_LABEL = 1,ID_IMAGE,ID_EDIT,ID_LIST,ID_BUTTON,ID_COMBO, ID_BUTTON2 }; LRESULT CALLBACK WinProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam); HINSTANCE g_hInst;TCHAR szAppName[] = TEXT("SDI Frame");TCHAR szWinClass[] = TEXT("WIN_CLASS"); HWND button1,button2; int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR lpCmdLine, int nCmdShow){ MSG msg; WNDCLASS wc; HWND hwnd; g_hInst = hInstance; wc.cbClsExtra = 0; wc.cbWndExtra = 0; wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1); wc.hCursor = LoadCursor(NULL, IDC_ARROW); wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); wc.hInstance = hInstance; wc.lpfnWndProc = WinProc; wc.lpszClassName = szWinClass; wc.lpszMenuName = NULL; wc.style = CS_HREDRAW | CS_VREDRAW; if( !RegisterClass(&wc)) { MessageBox(NULL, TEXT("Error registering class"), TEXT("ERROR"), MB_OK); return 0; } hwnd = CreateWindow(szWinClass, szAppName, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 250, 200, (HWND) NULL, (HMENU) NULL, (HINSTANCE) hInstance, (void *) NULL); ShowWindow(hwnd, nCmdShow); UpdateWindow(hwnd); while (GetMessage(&msg, (HWND) NULL, 0, 0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return msg.wParam; } LRESULT CALLBACK WinProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam){ PAINTSTRUCT ps; HDC hdc; int iD; int i; switch(msg){ case WM_CREATE: button1 = CreateWindow(L"Button",L"start hook",BS_PUSHBUTTON | WS_CHILD | WS_VISIBLE ,50,50,150,25,hwnd,(HMENU)ID_BUTTON,g_hInst,0); button2 = CreateWindow(L"Button",L"end hook",BS_PUSHBUTTON | WS_CHILD | WS_VISIBLE ,50,100,150,25,hwnd,(HMENU)ID_BUTTON2,g_hInst,0); case WM_PAINT: hdc = BeginPaint(hwnd, &ps); EndPaint(hwnd, &ps); return 0; case WM_COMMAND: iD = LOWORD(wParam); if (iD == ID_BUTTON) { if (setHook()) { MessageBox(hwnd, L"hook succeed", L"box", MB_OK); } else { MessageBox(hwnd, L"Err hook!", L"box", MB_OK); } } else if (iD=ID_BUTTON2) { if (unHook(hHook)) { MessageBox(hwnd, L"UnHook ", L"box", MB_OK); } else { MessageBox(hwnd, L"Err unhook!", L"box", MB_OK); } } break; case WM_CHAR: i = wParam; break; case WM_DESTROY: PostQuitMessage(0); break; case WM_CLOSE: DestroyWindow(hwnd); break; }return DefWindowProc(hwnd, msg, wParam, lParam);} //// setuphook BOOL setHook(){ if (LoadLibraryW(L"..\\..\\DLL\\Debug\\DLL.dll") == NULL) { MessageBox(0, L"Can not load DLL file.",L"Error", 0); return FALSE; } HMODULE hDLL = GetModuleHandle(L"DLL"); if (hDLL == NULL) { return FALSE; } hHook = SetWindowsHookEx(WH_GETMESSAGE,(HOOKPROC)GetProcAddress(hDLL,"GetMsgProc"),hDLL, 0); if (hHook == NULL) { return FALSE; } LOADPROC fPtrFcnt; fPtrFcnt = (LOADPROC)GetProcAddress(hDLL,"SetGlobalHookHandle"); if (fPtrFcnt == NULL) { return FALSE; } fPtrFcnt(hHook); return TRUE; } BOOL unHook(HHOOK hHook){ return UnhookWindowsHookEx(hHook);}
còn đây là code DLL
Mã:
#include <Windows.h> #pragma data_seg("SHARED_DATA")#pragma data_seg()HHOOK hGobalHook=NULL; __declspec(dllexport) LRESULT CALLBACK GetMsgProc(int nCode,WPARAM wParam,LPARAM lParam){ if (nCode<0) { return CallNextHookEx(hGobalHook,nCode,wParam,lParam); } MSG* msg=(MSG*)lParam; if (msg->message==WM_CHAR) { if ((0x61<=msg->wParam)&&(msg->wParam<=0x7A)) { msg->wParam=msg->wParam - 0x20; } } return CallNextHookEx(hGobalHook,nCode,wParam,lParam);} __declspec(dllexport) void SetGlobalHookHandle(HHOOK hHook){ hGobalHook=hHook;}
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