I'm trying to write a simple Tablet PC app in VB6 with the Automation
library inkobj.dll.

I am using an InkCollector attached to a window (e.g. a PictureBox) to
collect a bitmap image of the doodles made over the window..

I am then using InkCollector.Ink.Save(IPF_GIF) to generate a GIF
bitmap that I save to a file.

Because I want a bitmap that covers the entire PictureBox, I start by
adding a diagonal ink stroke from the upper left of the window to the
lower right.
This forces the InkRectangle to the size I want.
I compute the Ink Coordinates for this by calling Ink.Renderer with
the DC of the attached window,
then I call Ink.CreateStrokes and this works properly if I save the
GIF file.

The display also looks correct, with a diagonal line from UL to LR.

If I now doodle on the window, this works and displays correctly.

So far so good.

The problem comes if I now call Ink.Save(IPF_GIF) to save the Ink.
Now, the diagonal stroke I created looks ok, but the doodles are
shrunk to the upper left of the GIF file.

Why are my pen doodles not scaling properly as they appeared during
the drawing process. Why is Ink.Save moving the doodles, but keeping
my diagonal stroke intact?
Is there some special scaling parameters I must set in InkCollector to
save the ink image the way it is being displaying?

Also, I've noticed that penstrokes moved from inside to outside the
PictureBox are also being picked up. How do I capture Ink strokes.made
only within the attached window?
Do I need to do something in addition to setting the InkCollector.hWnd
to the attached window's handle?

I would think that using InkCollector this way would be
straightforward, but there is obviously something I am not
understanding here.

Thanks for any help / advice!

See this thread in the MSDN forum:
http://forums.microsoft.com/MSDN/Sho...27811&SiteID=1

Thanks,
Stefan Wick
http://blogs.msdn.com/swick/

"hogwell" wrote:

> I'm trying to write a simple Tablet PC app in VB6 with the Automation
> library inkobj.dll.
>
> I am using an InkCollector attached to a window (e.g. a PictureBox) to
> collect a bitmap image of the doodles made over the window..
>
> I am then using InkCollector.Ink.Save(IPF_GIF) to generate a GIF
> bitmap that I save to a file.
>
> Because I want a bitmap that covers the entire PictureBox, I start by
> adding a diagonal ink stroke from the upper left of the window to the
> lower right.
> This forces the InkRectangle to the size I want.
> I compute the Ink Coordinates for this by calling Ink.Renderer with
> the DC of the attached window,
> then I call Ink.CreateStrokes and this works properly if I save the
> GIF file.
>
> The display also looks correct, with a diagonal line from UL to LR.
>
> If I now doodle on the window, this works and displays correctly.
>
> So far so good.
>
> The problem comes if I now call Ink.Save(IPF_GIF) to save the Ink.
> Now, the diagonal stroke I created looks ok, but the doodles are
> shrunk to the upper left of the GIF file.
>
> Why are my pen doodles not scaling properly as they appeared during
> the drawing process. Why is Ink.Save moving the doodles, but keeping
> my diagonal stroke intact?
> Is there some special scaling parameters I must set in InkCollector to
> save the ink image the way it is being displaying?
>
> Also, I've noticed that penstrokes moved from inside to outside the
> PictureBox are also being picked up. How do I capture Ink strokes.made
> only within the attached window?
> Do I need to do something in addition to setting the InkCollector.hWnd
> to the attached window's handle?
>
> I would think that using InkCollector this way would be
> straightforward, but there is obviously something I am not
> understanding here.
>
> Thanks for any help / advice!
>
>