Hi Ian, Thank you very much for your help with this problem. I did what you suggested and found out that I am getting a 'legacy' metafile. I've been able to convert it enhanced metafile, but Metafile object doesn't want to accept it anyway, so I ended up with saving the metafile on the disk using CopyMetaFile API and then reading it into a Metafile object.
Thanks again, Alex On Wed, 8 May 2002 09:37:47 +0100, Ian Griffiths <[EMAIL PROTECTED]> wrote: >Do you have any means of verifying that what you're getting back is >definitely a valid metafile handle? Can you write an unmanaged test >harness? > >Alternatively could you try calling DeleteEnhMetaFile (using P/Invoke, i.e. >[DllImport]) and see if it returns an error. That would at least let you >test whether the handle you've been given is really a metafile. > >Actually that's a point, do you know if it's a metafile or an enhanced >metafile? I'm not sure that the Metafile classes can do legacy metafiles, >only EMFs. (It can do so-called dual enhanced metafiles, which contain >extra stuff that avoids losing too much information when you convert to a >legacy metafile. But I think this is just a feature of the EMFs that it >happens to support. It doesn't appear to provide any API for converting >between legacy and enhanced metafiles.) > >If it's a legacy metafile, I think you may need to use P/Invoke to call >Win32 APIs to convert it. The Win32 SDK docs explain how to do this - you >call GetMetaFileBitsEx on the old metafile to copy its contents into a >buffer, and then use SetWinMetaFileBits to build a new enhanced metafile >from the old metafile. That returns a handle to an enhanced metafile which >you could then pass to the Metafile constructor. > > >-- >Ian Griffiths >DevelopMentor > >----- Original Message ----- >From: "Alex Yakhnin" <[EMAIL PROTECTED]> > > >> Yes Ian, >> >> I'd tried Metafile with different ctors and passing IPicture.Handle - the >> result I was getting the same "A generic error occurred in GDI+." >exception. >> >> >> Ian Griffiths <[EMAIL PROTECTED]> wrote: >> >> >At the risk of suggesting the obvious, have you tried the Metafile class? >> >It has a constructor which takes an IntPtr which is a handle to a >metafile. >> >You get to pass a bool specifying whether the .NET Metafile object should >> >delete the underlying metafile handle when it is destroyed. >> > >> > >> >----- Original Message ----- >> >From: "Alex Yakhnin" <[EMAIL PROTECTED]> >> > >> >I've checked it - it's a metafile. >> >What should I do with it? >> > >> >On Fri, 3 May 2002 18:00:35 +0200, Mattias =?iso-8859-1?Q?Sj=F6gren?= >> ><[EMAIL PROTECTED]> wrote: >> > >> >>>I get exception: "A generic error occurred in GDI+". >> >>>I am pretty much sure that I get a valid IPicture. >> >> >> >>Perhaps it's not a bitmap, but some other kind of picture (e.g. an >icon). >> >>See what IPicture.Type returns. If it's an icon, use Icon.FromHandle() >> >instead. > >You can read messages from the Advanced DOTNET archive, unsubscribe from Advanced DOTNET, or >subscribe to other DevelopMentor lists at http://discuss.develop.com. You can read messages from the Advanced DOTNET archive, unsubscribe from Advanced DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com.
