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Editorial Team
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Asked: 2026-05-19T02:54:39+00:00

i try to get a selected text and the word under mouse in firefox

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i try to get a selected text and the word under mouse in firefox

after a lot of search i get the solution that i must access a document’s HTML in Firefox using IAccessible

i found that solution in c++ in this link
How to access a document's HTML in Firefox using IAccessible

the solution use ISimpleDOMNode.idl file so the first step to convert that solution from c++ to c# is convert

ISimpleDOMNode.idl to tlb file and convert tlb to dll fill

i try to use VS Command Prompt with this command to convert to tlb file
midl ISimpleDOMNode.idl

but That generate ISimpleDOMNode.h and ISimpleDOMDocument.h, which define the interfaces. It also create ISimpleDOMNode_i.c and ISimpleDOMDocument_i.c but there is no tlb file

what is the wrong ?

this the link of ISimpleDOMNode.idl file

http://www.4shared.com/file/MddCFmXa/ISimpleDOMNode.html

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1 Answer

  1. Editorial Team
    interface ISimpleDOMNode : IUnknown {
    // etc..
}

    That’s where the buck stops, IUnknown derived interfaces are not Automation compatible. They are usable from C++ code, note the .h files generated by midl and the amount of cpp_quote() in the .idl file. An Automation compatible COM interface is derived from IDispatch and uses the sub-set of Automation compatible types for the function arguments. Variant, BSTR and SafeArray are popular choices.

    Technically it is possible to re-declare the interface types in C# code, you just don’t get any help from a type library to get that right. And you’ll have to deal with the no-multiple-inheritance headache (not this one). Tlbimp.exe is powerless without a type library.

    Use C++/CLI to get this going, you can write a ref class wrapper and you can #include the .h file.

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