Search code examples
c#windowswinapiwindows-10tablet

Register a touch event on Windows 10 (without a mouse click or actual touch)

I'm developing an application for windows 10 (PC device) that uses the capability of "tablet mode".

I want to register a touch event on a given x and y position (without a mouse click or actual touch). What are the APIs for handling this kind of action in C#?

Solution

  • If you want to simulate touch event in Windows there is a Win32 API for it.

    MSDN: InjectTouchInput

    NuGet: C# wrapper

    You can simulate absolutely any combination of pointer input that Windows 10 is capable of, including pressure, contact area, pens, touch, mouse, multitouch, etc.

    Sample code:

    //usings:
using TCD.System.TouchInjection;
using static TCD.System.TouchInjection.TouchInjector;


// code:

InitializeTouchInjection();

var pointer = new PointerTouchInfo();

//We can add different additional touch data
pointer.TouchMasks = TouchMask.PRESSURE;
pointer.Pressure = 100;


//Pointer ID is for gesture tracking
pointer.PointerInfo.PointerId = 1;
pointer.PointerInfo.pointerType = PointerInputType.TOUCH;

pointer.PointerInfo.PtPixelLocation.X = 200;
pointer.PointerInfo.PtPixelLocation.Y = 200;

pointer.PointerInfo.PointerFlags = PointerFlags.INRANGE | PointerFlags.INCONTACT | PointerFlags.DOWN;

InjectTouchInput(1, new[] { pointer });

//Hold touch for some time
Thread.Sleep(100);

pointer.PointerInfo.PointerFlags = PointerFlags.UPDATE;

InjectTouchInput(1, new []{ pointer });