// Print current default monitor details void PrintDefaultMonitorInfo() POINT pt = 0, 0 ; HMONITOR hDefault = MonitorFromPoint(pt, MONITOR_DEFAULTTOPRIMARY);
RegisterClass(&wc); HWND hwnd = CreateWindowEx(0, CLASS_NAME, "MonitorWatcher", 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, wc.hInstance, NULL); monitor default-monitor for windows 10 x64
// 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 HMONITOR hDefault = MonitorFromPoint(pt
// Initial print PrintDefaultMonitorInfo(); HWND hwnd = CreateWindowEx(0
// Callback for display settings changes LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) switch (msg) case WM_DISPLAYCHANGE: g_bChanged = TRUE; break; case WM_SETTINGCHANGE: if (wParam == SPI_SETWORKAREA) g_bChanged = TRUE; break;
// Orientation std::string orientation = "Landscape"; if (dm.dmDisplayOrientation == DMDO_90
DEVMODE dm = GetCurrentDevMode(deviceName);