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Thread: [VB6] IPreviewHandler: Show non-image file previews from any reg'd preview handler

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  1. Dec 11th, 2018, 07:30 AM #34
    Stu2
    Stu2 is offline
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    Re: [VB6] IPreviewHandler: Show non-image file previews from any reg'd preview handle

    OK, I've tried the sample program (modified to use CLSCTX_LOCAL_SERVER only) on a few 'real-life' end-user PCs.

    It worked on everything I tried - including Win 10 + Adobe Reader XI, Win 10 + Adobe Reader DC, Win 7 + Adobe Reader DC. Mainly 64 bit OSs, plus a couple of Win 7 32bit.
    Other common apps (Word, Excel, etc.) worked too.

    I think I'll follow Olaf's suggestion and use CLSCTX_LOCAL_SERVER only, then if an error occurs try CLSCTX_INPROC_SERVER.

    Here is the debug output from a PDF preview...
    Code:
    using isi
sFile=C:\Test\00000017.PDF
sExt=.PDF
Got handler CLSID; attempting to create IPreviewHandler
IInitializeWithFile not supported.
IInitializeWithItem not supported.
Attempting to use IStream
Got file size=405169
QI.hr=0
SetWindow hr=0
DoPreview hr=0
    Last edited by Stu2; Dec 11th, 2018 at 07:35 AM.
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