Hi, I'm trying to implement a preview feature in a managed application to
preview files of arbitrary type. Has anyone done this in a managed app? I've
seen at least one suggestion that you can host prevhost on your form, but
I'm not sure this is correct.
I've seen the IPreviewHandler and IPreviewHandlerFrame interfaces, but
haven't managed to use them from C#. They both live in shobjidl.idl, but
when I create the type library using midl.exe, the key interfaces are
missing.
Can anyone offer any assistance?
Tim
3  3142 
Tim Haughton wrote:
Hi, I'm trying to implement a preview feature in a managed
application to preview files of arbitrary type. Has anyone done this
in a managed app? I've seen at least one suggestion that you can host
prevhost on your form, but I'm not sure this is correct.
I suppose you could, but I think it would be rather hard work. Also, preview handlers are new for Vista so it wouldn't be much use on previous versions. If you just want a pictorial representation of a file, you could show a thumbnail. On Vista, IShellItemImageFactory::GetImage makes this very easy. On older Windows versions, you can fall back to GetUIObjectOf/IExtractImage.
--
Jim Barry, MVP (Windows SDK)
Tim,
Why not just declare the interfaces in C# code manually? They are not
that big, and the types are not so complex that it would be very difficult.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com
"Tim Haughton" <ti*********@gmail.comwrote in message
news:Wk*****************@fe07.news.easynews.com...
Hi, I'm trying to implement a preview feature in a managed application to
preview files of arbitrary type. Has anyone done this in a managed app?
I've
seen at least one suggestion that you can host prevhost on your form, but
I'm not sure this is correct.
I've seen the IPreviewHandler and IPreviewHandlerFrame interfaces, but
haven't managed to use them from C#. They both live in shobjidl.idl, but
when I create the type library using midl.exe, the key interfaces are
missing.
Can anyone offer any assistance?
Tim
Thanks Nicholas, I'm heading that way, so I'll give it a look.
Tim
"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard.caspershouse.comwrote in
message news:%2****************@TK2MSFTNGP05.phx.gbl...
Tim,
Why not just declare the interfaces in C# code manually? They are not
that big, and the types are not so complex that it would be very
difficult.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com
"Tim Haughton" <ti*********@gmail.comwrote in message
news:Wk*****************@fe07.news.easynews.com...
>Hi, I'm trying to implement a preview feature in a managed application to
preview files of arbitrary type. Has anyone done this in a managed app?
I've
seen at least one suggestion that you can host prevhost on your form, but
I'm not sure this is correct.
I've seen the IPreviewHandler and IPreviewHandlerFrame interfaces, but
haven't managed to use them from C#. They both live in shobjidl.idl, but
when I create the type library using midl.exe, the key interfaces are
missing.
Can anyone offer any assistance?
Tim
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