c# - Implement zoom functionality like touchpad -

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i'm working on app in i'm going map mouse functions onto keyboard keys. example, if user presses 'l', app simulate left mouse click. have mapped clicks , scroll using:

[dllimport("user32.dll", charset = charset.auto, callingconvention = callingconvention.stdcall)] public static extern void mouse_event(uint dwflags, uint dx, uint dy, uint cbuttons, uint dwextrainfo);

now want implement zoom in , out functionality. in laptops, using pinch on touchpad, can zoom in , out. how can achieve that?

there nice function in windows 8+ - injecttouchinput. allows inject touch events or mouse events parameters want. packed .net wrapper.

this question contains working c++ sample code pinch, can adapt needs. simulate zoom touchscreen.

this 1 way. other way may sending wm_mousewheel ctrl key modifier target hwnd, simulating mouse wheel zoom.


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