Path: utzoo!attcan!uunet!dino!ux1.cso.uiuc.edu!ux1.cso.uiuc.edu!uxa.cso.uiuc.edu!mms00786
From: mms00786@uxa.cso.uiuc.edu
Newsgroups: comp.windows.ms
Subject: MetaFile Woes...
Message-ID: <118500017@uxa.cso.uiuc.edu>
Date: 4 Jun 90 23:48:00 GMT
Lines: 45
Nf-ID: #N:uxa.cso.uiuc.edu:118500017:000:1799
Nf-From: uxa.cso.uiuc.edu!mms00786    Jun  4 18:48:00 1990


Hello.

I have two questions relating to Metafiles.

a) Can someone point out how to display a metafile (.wmf) that was generated
   using CorelDraw 1.10d? Here's how far I got - I wrote a program that does
   a GetClipboardData(CF_METAFILEPICT), got the lpMFPict structure, and
   set up my device mapping mode according to the mm, xExt, and yExt specs.
   I ran Corel, drew something, copied it to the clipboard, then ran my
   program. I was *successfully* able to import the metafile. Moreover, I was
   able to save the metafile to disk, then run another program that was able
   to correctly display the metafile. 
   However, if I use the same drawing and ask Corel to export it to .wmf file,
   I am not able to display the picture. I assume it has something to do with
   the mapping mode etc. Anyone have any info?

b) Initially, I thought I'd be ok because there's atleast one way I can
   get the drawing. But, I am able to copy a surprizingly small number of
   objects to the clipboard - a few curves, and Corel complains that metafile
   is too big to copy to clipboard. So how do I import a drawing from Corel?

c) Why does Corel crash under the debugging version of Windows/386 when I try
   to cut or copy? 

d) Lastly, why won't the following piece of code, drawn closely from Petzold's
   book, work more than once?

    hResource = LoadResource(....
    LockResource(hResource);
    hMF = SetMetaFileBits(hResource);
    GlobalUnlock (hResource);

    /* Set up the DC ... */
    PlayMetaFile(hDC, hMF);
    DeleteMetaFile (hMF);

   The first time this code gets executed, everything is just fine - the meta
   file plays great. The second time around, SetMetaFileBits returns 0,
   meaning it failed. Why?

Thanks for any pointers (or handles, if you get my drift!)

Milan
.