private static bool RegisterRawInputDevices(User32.RAWINPUTDEVICE data)
{
var devicePtr = Marshal.AllocHGlobal(Marshal.SizeOf(data));
Marshal.StructureToPtr(data, devicePtr, false);
bool ret = User32.RegisterRawInputDevices(devicePtr, 1, (uint)Marshal.SizeOf(data));
Marshal.FreeHGlobal(devicePtr);
return(ret);
}
public static void UnregisterForMouseInput()
{
var data = new User32.RAWINPUTDEVICE
{
usUsagePage = User32.HidUsagePage.GENERIC,
usUsage = User32.HidUsage.Mouse,
dwFlags = User32.RIDEV_REMOVE
};
if (!RegisterRawInputDevices(data))
{
Trace.WriteLine($"InputHelper UnregisterForMouseInput: {Marshal.GetLastWin32Error()}");
}
}
void InitializeRawInput()
{
_listenerHwnd = new WindowInteropHelper(_listenerWindow).Handle;
User32.RAWINPUTDEVICE[] rawInputDevice = new User32.RAWINPUTDEVICE[1];
rawInputDevice[0].UsagePage = User32.UsagePageGenericDesktop;
rawInputDevice[0].Usage = User32.UsageMouse;
rawInputDevice[0].Flags = User32.RawInputDeviceFlags.InputSink;
rawInputDevice[0].WindowHandle = _listenerHwnd;
bool success;
success = User32.RegisterRawInputDevices(rawInputDevice, 1, Marshal.SizeOf(typeof(User32.RAWINPUTDEVICE)));
_hwndSource = HwndSource.FromHwnd(_listenerHwnd);
_wndprocHook = new HwndSourceHook(WndProc);
_hwndSource.AddHook(_wndprocHook);
}
private void RegisterForRawMouseInput(uint flags)
{
User32.RAWINPUTDEVICE mouseRawDevice = new User32.RAWINPUTDEVICE();
mouseRawDevice.usUsagePage = (ushort)User32.HidUsagePage.GENERIC;
mouseRawDevice.usUsage = (ushort)User32.HidUsage.Mouse;
mouseRawDevice.dwFlags = flags;
mouseRawDevice.hwndTarget = (flags == User32.RIDEV_REMOVE ? IntPtr.Zero : _hwnd);
var devicePtr = Marshal.AllocHGlobal(Marshal.SizeOf(mouseRawDevice));
Marshal.StructureToPtr(mouseRawDevice, devicePtr, false);
if (User32.RegisterRawInputDevices(devicePtr, 1, (uint)Marshal.SizeOf(mouseRawDevice)) == false)
{
Trace.WriteLine($"Couldn't register for raw input: {flags} {Marshal.GetLastWin32Error()} {_hwnd}");
}
Marshal.FreeHGlobal(devicePtr);
}
