Monitor Default-monitor For Windows 10 X64 -

RECT rcMonitor = mi.rcMonitor; int width = rcMonitor.right - rcMonitor.left; int height = rcMonitor.bottom - rcMonitor.top;

DEVMODE dm = GetCurrentDevMode(deviceName);

return DefWindowProc(hwnd, msg, wParam, lParam);

// Orientation std::string orientation = "Landscape"; if (dm.dmDisplayOrientation == DMDO_90 monitor default-monitor for windows 10 x64

// Global flag to indicate changes volatile BOOL g_bChanged = TRUE;

if (!hwnd) std::cerr << "Failed to create message window.\n"; return 1;

// 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; RECT rcMonitor = mi

// 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;

RegisterClass(&wc); HWND hwnd = CreateWindowEx(0, CLASS_NAME, "MonitorWatcher", 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, wc.hInstance, NULL);

char deviceName[128]; wcstombs(deviceName, mi.szDevice, 128); RECT rcMonitor = mi.rcMonitor

// If change detected, refresh info if (g_bChanged) g_bChanged = FALSE; PrintDefaultMonitorInfo();

// Get DPI scale (Windows 10 per-monitor DPI) UINT dpiX = 96, dpiY = 96; HMONITOR hMonitor = MonitorFromPoint(pt, MONITOR_DEFAULTTOPRIMARY); if (hMonitor) HMONITOR hPrimary = MonitorFromWindow(GetDesktopWindow(), MONITOR_DEFAULTTOPRIMARY); if (hPrimary) dpiX = GetDpiForMonitor(hPrimary, MDT_EFFECTIVE_DPI); dpiY = dpiX; // usually same

return "Unknown";

// Print current default monitor details void PrintDefaultMonitorInfo() POINT pt = 0, 0 ; HMONITOR hDefault = MonitorFromPoint(pt, MONITOR_DEFAULTTOPRIMARY);