What are underscored symbols in a VB DLL?

StackOverflow https://stackoverflow.com/questions/233035

  •  04-07-2019
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Question

I have a C++ app in VS2005 and import a VB DLL. IntelliSense shows me all the symbols in the DLL as expected but it also shows all (or nearly all) of them again with an underscore prefix (no @s in them though). Why is this? What are the differences between the underscored items and the normal items?

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Solution

Assuming you're talking VB6, the leading underscore version _Klass is the Vb-generated default interface for the class Klass. This site has a nice explanation: http://www.15seconds.com/issue/040721.htm

OTHER TIPS

In (some) c# coding standards the underscore prefix denotes a private variable, that might explain it... is it VB or VB.Net?

Check out this wiki article on Name Mangling for an indepth look:

http://en.wikipedia.org/wiki/Name_mangling

Are the symbols properties? If so, these might just be the private variables backing the properties.

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