How to detect mouse double click and simultaneous click

Hi everyone,
I would like to detect mouse double click and (almost) simultaneous click of
two or more buttons in moufiltr. Do I need a timer for that or I can do it
by detecting the bits in ButtonFlags in the same or consecutive
MOUSE_INPUT_DATA?
Thanks in advance.
Liang Fu

 

I'm not sure I understand what you mean.

Each MOUSE_INPUT_DATA will contain information from a single packet and
will have the button transition bits relevant to that packet, and the
order of them will be preserved from the viewpoint of a moufiltr/style
driver. No packets are "combined" or anything like that. Does that
answer the question?

 

two or more buttons in moufiltr. Do I need a timer for that or I can do it

Just call KeQuerySystemTime when the next MOUSE_INPUT_DATA arrives to your
driver. Then subtract the values when the next data will arrive. This is the
kind of "timer" you need.

 

you would compare the change in ButtonFlags in 2 consecutive
MOUSE_INPUT_DATA. the problem here is that double click times are a per
user setting and the driver does not know what it is.

d

 

Depending on what he's trying to do ...

1) if you want to *generate* a double click, calling the service
callback once with a buffer containing 4 packets of the form
down/up/down/up will generate a double-click regardless of what the user
setting is (unless there's a way for a user to disable them entirely...
I don't remember).

2) if you're *detecting* double clicks, you *really* need to know the
user's double click time, so have a user mode app monitor that (remember
it can change during operation) and send an IOCTL to a device object
your filter creates.

 

Hi everyone,
Thank you so much for your kind help. I will try with your suggestions.
Liang Fu