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Old 22-04-2004, 19:16
Gerard Hermans
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Default COM interop


I am using COM interop for CorelDRAW automation. I.e. instead of VBA I use C# and all goes quite well, except for the following stubborn problem:

Each time I use Export or SaveAs options like: StructExportOptions (StructExportOptionsClass) or StructSaveAsOptions (StructSaveAsOptionsClass) I get the InvalidCastException, QueryInterface failed (sometimes: not supported).

I wonder if anybody could give me a clue what is going wrong here?

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Old 23-04-2004, 00:09
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Alex Alex is offline
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Default Re: COM interop


How do you create those objects? Do you use new to create an instance of the object or do you call Application.CreateStructSaveAsOptions, for example?

Also, what version of CorelDRAW do you use?
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Old 23-04-2004, 13:04
Gerard Hermans
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I used CorelDRAW vs. 11.

However, I installed SP1 and SP2 and to my surprise, the problem does not occur any more!
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