🚀 go-pugleaf

In article <1352@bjcong.bj.co.uk> rkt@bjcong.bj.co.uk (RAKESH TANDON) writes:
>Hi,
>   I want to be able to make my ICON flash to attract the users attention,
>something like the way the RECORDER program flashs its icon. Does anyone
>have any ideas.
>
>I have posted this question twice already and have not recieved any replies,
>I'm sure someone out there knows the answer.

Ok,
	this is all theory and I haven't tried programming this but
this is what I think the recorder app is doing when it is flashing
its icon.

Firstly lets look at what spy tells us:

0000 WM_TIMER			00DF 0A9DOOC2		erase sequence
5078 WM_ICONERASEBKGND	0846 00000000

0000 WM_TIMER			00DF 0A9DOOC2		paint sequence
5078 WM_PAINTICON		0001 00000000
5078 WM_ICONERASEBKGND	0836 00000000
50BC WM_NCPAINT			0001 00000000

Where:
	5078 is the parent (main) window
	50BC is the list box within the main window

From this we can deduce that recorder sets up a simple timer (ie no
timer callback function) and on receipt of alternate WM_TIMER sends messages
to itself which then erase and paint the icon.

I would guess that recorder isn't doing anything fancy with these messages,
just passing them to DefWindowProc.  However, to erase the icon I think you
need to InvalidateRect the icon window (Main window of the app).  Painting
the icon you just pass the message on similarly with the second
WM_ICONERASEBKGND, which I guess fills in the background around the icon.

I think the NCPAINT message can be ignored. It seems to be going to the
list box, why I can't think!

Hope this is useful, anyone have any other ideas??

Pete.

>Rakesh Kumar Tandon          :  email - rkt@bj.co.uk


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