How to user SetCapture??

[JC Mann]

I'm trying to dynamically draw picture underneath my cursor as it
floats over a TImage...but I'm not receive the OnMouseMove events
fast enough. So, the picture I draw lags behind the cursor position.
I tried to use SetCapture. But this isn't working. When I call
SetCapture(MyForm.Handle) I get a return code of 0, which according
the doc. means it failed. I have to assume it did fail, because I'm
still receive the mouse move events at the same slow rate.

Can you help me?

I look forward to your response.

Thanks.

==
JC Mann

[Kurt Barthelmess (TeamB)]

JC -

Assuming the mouse is over your window, the speed at which you get the
WM_MOUSEMOVE messages is going to depend on how busy Windows is.
Calling SetCapture is not going to affect that - you effectively
already have the mouse "captured." As for getting a return code of 0,
that just means no other window has previously captured the mouse.

Keep in mind that the mouse driver has a much higher priority than any
application in the system. There's nothing you can do about that. What
you might be able to do is substitute a different cursor which
includes your "picture". But that will only work if your "picture"
will fit within the systems cursor dimensions.

Good luck.

Kurt

[cubic...@gmail.com]

See this:
http://stackoverflow.com/questions/4438221/is-mouse-over-form/21162272#21162272