void InitBorders()
{
_left = new BorderWindow(this)
{
Side = BorderSide.Left
};
_top = new BorderWindow(this)
{
Side = BorderSide.Top
};
_right = new BorderWindow(this)
{
Side = BorderSide.Right
};
_bottom = new BorderWindow(this)
{
Side = BorderSide.Bottom
};
SetRegion(hWndContent, 0, 0, true);
var hSrc = HwndSource.FromHwnd(hWndContent);
hSrc.AddHook(WndProc);
//Calculate the effective DPI used by WPF;
_wpfDPI = 96.0 * hSrc.CompositionTarget.TransformToDevice.M11;
//Get the Current DPI of the monitor of the window.
_monitorDPI = Shcore.GetDpiForWindow(hSrc.Handle);
//Calculate the scale factor used to modify window size, graphics and text
_dpiScaleFactor = _monitorDPI / _wpfDPI;
ContentWindow.Width *= _dpiScaleFactor;
ContentWindow.Height *= _dpiScaleFactor;
RescaleForDpi();
// SWP_DRAWFRAME makes window bg really transparent (visible during resize) and not black
User32.SetWindowPos(hWndContent, IntPtr.Zero, 0, 0, 0, 0,
SetWindowPosOptions.SWP_NOOWNERZORDER |
SetWindowPosOptions.SWP_DRAWFRAME |
SetWindowPosOptions.SWP_NOACTIVATE |
SetWindowPosOptions.SWP_NOZORDER |
SetWindowPosOptions.SWP_NOMOVE |
SetWindowPosOptions.SWP_NOSIZE);
}
private static void HookupDpiMessage(Window win, IntPtr hwnd)
{
var hSrc = HwndSource.FromHwnd(hwnd);
hSrc.AddHook(WndProc);
//Calculate the effective DPI used by WPF;
var wpfDPI = 96.0 * hSrc.CompositionTarget.TransformToDevice.M11;
//Get the Current DPI of the monitor of the window.
var monitorDPI = Shcore.GetDpiForWindow(hSrc.Handle);
SetWindowDpi(win, monitorDPI);
//Calculate the scale factor used to modify window size, graphics and text
var dpiScaleFactor = monitorDPI / wpfDPI;
SetWindowDpiScale(win, dpiScaleFactor);
win.Width *= dpiScaleFactor;
win.Height *= dpiScaleFactor;
RescaleForDpi(win);
}