Re: Creating Bitmaps for CBitmapButtons at runtime

From:

"AliR $VC++ MVP$" <AliR@online.nospam>

Newsgroups:

microsoft.public.vc.mfc

Date:

Wed, 14 Mar 2007 19:53:21 GMT

Message-ID:

<RoYJh.5609$Um6.2511@newssvr12.news.prodigy.net>

Actually ignore my last recommendation, I just looked at the Attach method,
it doesn't seem to destroy it's current handle. That seems a little odd to
me.

Anyway, As long as you are detaching the HBITMAP out of the CBitmap objects
that are loading them before you start attaching them to the button
variables, and if you are not calling DeleteObject anywhere then look for
variables going out of scope or something.

AliR.

"AliR (VC++ MVP)" <AliR@online.nospam> wrote in message
news:rkYJh.5608$Um6.4381@newssvr12.news.prodigy.net...

Yes DeleteObject will delete the bitmap.

Instead do this.

//first detach the old HBITMAP so that it doesn't get deleted by Attach
m_Bitmap.Detach();
m_Bitmap.Attach(hBitmap);

keep in mind that if the HBITMAP that you just detached is not one of
yours you will have to delete it. If you never assign anything other than
your own persistant bitmaps than you don't have to worry about deleting
anything, until the end when you delete your own bitmaps.

AliR.

"nappy" <spam@spam.com> wrote in message
news:y0XJh.7405$M65.1599@newssvr21.news.prodigy.net...

"AliR (VC++ MVP)" <AliR@online.nospam> wrote in message
news:_8BJh.4681$JZ3.4296@newssvr13.news.prodigy.net...

Looks fine.

Just make sure that you call DeleteObject before the Attach.

m_bitmap.DeleteObject();
m_bitmap.Attach(hbitmap);

AliR.

This deletes the bitmap I presume? I want to set the button bitmaps from
a static array of bitmaps that will exist thoughout the life of the app.
I am a bit confused as they seem to be getting deleted even without the
call to DeleteObject().