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View DLL's

Posted on 1997-12-09
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Last Modified: 2011-04-14
where I can obtain a free View DLL's (see for each *.DLL the functions with sintax, parameters, etc) ?
what functions have netapi.dll (sintax, parameters) ?
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Question by:miguelpf
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alexo earned 50 total points
ID: 1017141

(Assuming a Win32 platform and C language)

(netapi.dll mentioned near end of discussion)

You can get the list of names that a DLL exports but function parameters are a different thing.

The easiest way of getting the list of exported names is to QuickView the DLL.  QuickView comes with every Win32 platform so no need to look elswhere.

Look for the section "Export table" for the exported names.

Now, some issues:

1) How to determine if the name refers to a function or a variable?

Each entry in the export table has an address.  Look for the "Sections" part to see which section the address resides in.  The section's characteristics state if it contains executable code.

2) Why there are some entries without names?

A DLL can export functions by name or by ordinal number (or both).  Functions exported by ordinal number only need an import library or a DEF file to be called by name (you cannot infer the name from the DLL).

3) What about parameters?

Due to the way parameters are passed, you cannot infer the parameters from the DLL (unless it's C++).

However, sometimes you'll see entries like _FunctionName@8

That means that the function FunctionName() takes 8 bytes of paramteres.  There is no way (aside from disassembly) to know if it is two 4-byte longs, four 2-byte shorts, eight chars or any combination thereof (and I'm not even talking about pointers, floating point types or structs).

More than that, depending on the calling convention, the parameters may be pushed on the stack in a left-to-rigt order, right-to-left order or passed in registers.

If it's C++ code, the function name is mangled (compiler specific) and contains the number and types of the parameters in the name.

Regarding netapi.dll, since it's a standard DLL I'd suggest you check the function names using the method above, then consult the help of a C compiler or SDK about each function (it seems to be a 16-bit DLL).

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by:miguelpf
ID: 1017142
thanks !!!
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