c# - WndProc in my WPF app not 'handling' WM_INPUT event -


[edit] here's i've gleaned mouse input handling far. note i've learned via bunch of different sources , via experimentation, don't take gospel: 1) mouse event originates mouse move 2) setwindowshookex(wh_mouse_ll) handler lowlevelmouseproc sees event first 3) os/app framework handles mouse event @ high level (mouse cursor moves) 4) wm_input event picked app event queue , handled wndproc (although handling @ time not stop mouse cursor moving in step 3). 5) message dispatched via componentdispatcher 6) previewmousemove , mousemove events triggered , may handled app.

based on this, think way ensure mouse cursor doesn't move filter via wh_mouse_ll. of course, i've mentioned earlier in post, there isn't sufficient information @ point know device mouse event coming from, it's or nothing filtering, doesn't meet requirements.

[edit] i've verified i'm able drop events hooking wh_mouse_ll , returning value larger 0 handler. need figure out how match mouse event generated @ wh_mouse_ll level events coming device...

i did try returning value greater 0 wndproc. event still processed app.

i'm trying integrate rotary input device that's based upon y-axis of mechanical usb mouse. i'd device behave solely raw input device , normal mouse move events generated device (at least in context of application) dropped.

so far, i've been able hook wndproc wpf application mainwindow using windowiterophandler , addhook. i'm able receive wm_input events , filter mouse events specific usb vid/pid device (sufficient needs).

i expect marking message handled , returning 0 cause message not propagated rest of wpf window, that's not case... i'm still getting mousemove events when move device. here's code (simplified remove processing wm_input message, still exhibits same issue):

 public partial class mainwindow : window { private const int wm_input = 0x00ff; public mainwindow() { initializecomponent(); } public intptr wndproc(intptr hwnd, int msg, intptr wparam, intptr lparam, ref bool handled) { if (msg == wm_input) { // todo - figure out why doesn't halt further processing of handled event handled = true; } return intptr.zero; } [structlayout(layoutkind.sequential)] internal struct rawinputdevice { [marshalas(unmanagedtype.u2)] public ushort ususagepage; [marshalas(unmanagedtype.u2)] public ushort ususage; [marshalas(unmanagedtype.u4)] public int dwflags; public intptr hwndtarget; } private const int ridev_inputsink = 0x00000100; [dllimport("user32.dll")] extern static bool registerrawinputdevices(rawinputdevice[] prawinputdevice, uint uinumdevices, uint cbsize); private void window_sourceinitialized(object sender, eventargs e) { windowinterophelper helper = new windowinterophelper(this); hwndsource source = hwndsource.fromhwnd(helper.handle); rawinputdevice[] rid = new rawinputdevice[1]; rid[0].ususagepage = 0x01; rid[0].ususage = 0x02; rid[0].dwflags = ridev_inputsink; rid[0].hwndtarget = source.handle; registerrawinputdevices(rid, (uint)rid.length, (uint)marshal.sizeof(rid[0])); source.addhook(wndproc); } private void button1_click(object sender, routedeventargs e) { e.handled = true; } private void button1_mousemove(object sender, mouseeventargs e) { e.handled = true; } }

anyone know how dequeue or otherwise block mouse event i've handled in wndproc being propagated mainwindow?

tia!

-matt

after long hours of googling, looks else has described , solved i'm trying using umdf: http://oblita.com/interception

i hoping wouldn't have go there, it's looking way intercept events coming particular device.


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