POSTING SECOND TIME: drawing getting lost in my window

Hi all,
I draw lines using OnLButtonDown,
OnMouseMove and OnLButtonUp handlers with
functions MoveTo(pt), and
LineTo(pt1) with dc->SetROP2(R2_COPYPEN)
in OnLButtonUP.

what happens is, i get the lines drawn after giving points
but after when i bring different window w.g explorer in front of my
window using alt+tab , and again switch back to
my window, i get clean window , my lines
are gone. I want lines to stay there and
visible in my window even i go back and
forth. how to achieve that should
i save it in CMetafileDC and playback
in OnPaint handler.
please suggest.
thanks a lot.
Lee.




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Have a look at the scribble tutorial. Basically, you need to store the
points, and draw them in OnDraw (or OnPaint if you want a different drawing
for screen and printer). Use InvalidateRect(...) wisely, and make sure you
check that points need to be drawn before drawing them (the CRect method
PtInRect should help there).

Jase

"Yang Lee" <yang__lee@ausi.com> wrote in message
news:3db2038c606af2fba154a4b1943a0ff8.93862@mygate.mailgate.org...[color=blue]
> Hi all,
> I draw lines using OnLButtonDown,
> OnMouseMove and OnLButtonUp handlers with
> functions MoveTo(pt), and
> LineTo(pt1) with dc->SetROP2(R2_COPYPEN)
> in OnLButtonUP.
>
> what happens is, i get the lines drawn after giving points
> but after when i bring different window w.g explorer in front of my
> window using alt+tab , and again switch back to
> my window, i get clean window , my lines
> are gone. I want lines to stay there and
> visible in my window even i go back and
> forth. how to achieve that should
> i save it in CMetafileDC and playback
> in OnPaint handler.
> please suggest.
> thanks a lot.
> Lee.
>
>
>
>
> --
> Posted via Mailgate.ORG Server - [url]http://www.Mailgate.ORG[/url][/color]