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Windows API: Getting handle of Clarion style metafiles
2003-04-28 -- Leonid Chudakov
Newsgroups: comp.lang.clarion
I'm using temporary files.
!Check if it's Aldus style file
hFile = _lopen(ClarionMetafileName,2)
RetVal = _lread(hFile,Address(AldusHeader),22)
If AldusHeader.Key = 9AC6CDD7H Then !Aldus style file
!Create work wmf file
RetVal = GetTempPath(255,TempPath)
RetVal = GetTempFileName(TempPath,FilePrefix,0,TempFileName)
hTempFile = _lopen(TempFileName,2)
mfglbhnd = GlobalAlloc(BOR(GMEM_MOVEABLE,GMEM_ZEROINIT),
GetFileSize(hFile,0) - 22)
gptr = GlobalLock(mfglbhnd)
RetVal = _llseek(hFile,22,0)
RetVal = _hread(hFile, gptr, GetFileSize(hFile,0) - 22)
RetVal = _hwrite(hTempFile, gptr, GetFileSize(hFile,0) - 22)
RetVal = GlobalFree(mfglbhnd)
RetVal = _lclose(hTempFile)
hMeta = GetMetafile(TempFileName)
End
"Steve Johnson - ThinkData Inc." wrote in
message news:3ead942b$1@news.softvelocity.com...
> How would one skip the first 22 bytes without writing a new temporary
file?
> Do you have an example of handling this?
>
> "Leonid Chudakov" wrote in message
> news:3ead9366@news.softvelocity.com...
> > Hi Steve,
> >
> > Clarion generates aldus style wmfs. You need to skip first 22 bytes and
> use
> > GetMetafile.
> >
> > --
> > --
> > Leonid Chudakov
> > chudakov@netzero.com
> > Cool tools and Clarion examples at
> > http://www.klarisoft.com
> > http://members.tripod.com/cwstuff/clarion_products.htm
> >
> > "Steve Johnson - ThinkData Inc." wrote in
> > message news:3ead8f41$1@news.softvelocity.com...
> > > I have tried both GetMetaFile and GetEnhMetaFile - neither one works
> > > properly. Do you have a working example of one of these API functions
> > > actually functioning with Clarion WMF files?
> > >
> > > "Sebastian Streiger" wrote in message
> > > news:3ead8e7c@news.softvelocity.com...
> > > > Steve:
> > > > There are two "Flavors" of Meta Files.
> > > > Windows Meta Files - Old windows metafil format
> > > > Enhanced Meta Files - New (win 95 I guess) file format
> > > > Both of this file format usually use the WMF file extension. You
> > have
> > > to
> > > > read the file header to know wich one of them you are dealing with.
> > > > Clarion Report engine generates EMF.
> > > > You will have to dig in MSDN.
> > > > Try this link
> > > >
> > >
> >
>
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/metafil
> > > > e_0whf.asp
> > > >
> > > > Probably it won't work, cause MSDN is changes in it's navigation
tree
> > very
> > > > frequently.
> > > >
> > > > Bets regards
> > > >
> > > > --
> > > > Sebastián Streiger
> > > > Departamento Sistemas
> > > > Red Megatone
> > > > Tel: 0342-4502745
> > > > Int: 745
> > > > sstreige at redmegatone.com
> > > >
> > > >
> > > >
> > > >
> > > > "Steve Johnson - ThinkData Inc."
> escribió
> > > en
> > > > el mensaje news:3ead8947$1@news.softvelocity.com...
> > > > > Hi all -
> > > > >
> > > > > I'm having issues calling the GetMetaFile API function to retrieve
a
> > WMF
> > > > > file and convert it without using Clarion image controls. I have
it
> > > > > prototyped as follows:
> > > > >
> > > > > GetMetaFile(*cstring
> szMetaFile),long,pascal,raw,name('GetMetaFileA')
> > > > >
> > > > > No matter what I do, every time I call it and pass it the name of
a
> > > > Clarion
> > > > > generated WMF file I get no return value. Has anyone worked with
> WMF
> > > > files
> > > > > in this way?
> > > > >
> > > > > Thanks
> > > > >
> > > > > Steve Johnson
> > > > > ThinkData Inc.
> > > > > http://www.thinkdata.com
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>
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