int main() { std::cout << "Windows Default Monitor Watcher\n"; std::cout << "Monitoring for changes... (Press Ctrl+C to exit)\n\n";
std::cout << "\n=== Default Monitor Info ===\n"; std::cout << "Name : " << deviceName << "\n"; std::cout << "Resolution : " << width << " x " << height << "\n"; std::cout << "Refresh : " << dm.dmDisplayFrequency << " Hz\n"; std::cout << "Scale : " << std::fixed << std::setprecision(1) << scale << "x (" << dpiX << " DPI)\n"; std::cout << "Orientation: " << orientation << "\n"; std::cout << "Is Primary : Yes (default monitor)\n"; std::cout << "============================\n";
if (!hwnd) std::cerr << "Failed to create message window.\n"; return 1;
// Print current default monitor details void PrintDefaultMonitorInfo() dm.dmDisplayOrientation == DMDO_270) orientation = "Portrait"; monitor default-monitor for windows 10 x64
// Initial print PrintDefaultMonitorInfo();
// Message loop to process system events MSG msg; while (true) // Wait for messages (with timeout to allow periodic rechecks) DWORD ret = MsgWaitForMultipleObjects(0, NULL, FALSE, 200, QS_ALLINPUT); if (ret == WAIT_OBJECT_0) while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) TranslateMessage(&msg); DispatchMessage(&msg);
// Get current DEVMODE for the given monitor (by device name) DEVMODE GetCurrentDevMode(const std::string& deviceName) DEVMODE dm = 0 ; dm.dmSize = sizeof(dm); std::wstring wDevice(deviceName.begin(), deviceName.end()); EnumDisplaySettingsW(wDevice.c_str(), ENUM_CURRENT_SETTINGS, &dm); return dm; int main() { std::cout << "Windows Default Monitor
// If change detected, refresh info if (g_bChanged) g_bChanged = FALSE; PrintDefaultMonitorInfo();
return DefWindowProc(hwnd, msg, wParam, lParam);
// Register a simple window class to receive system messages const char CLASS_NAME[] = "MonitorWatcherClass"; WNDCLASS wc = {}; wc.lpfnWndProc = WndProc; wc.hInstance = GetModuleHandle(NULL); wc.lpszClassName = CLASS_NAME; int main() { std::cout <
// Global flag to indicate changes volatile BOOL g_bChanged = TRUE;
RegisterClass(&wc); HWND hwnd = CreateWindowEx(0, CLASS_NAME, "MonitorWatcher", 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, wc.hInstance, NULL);
