.net – How to detect the type of a dll? (COM, .NET, WIN32)

comdllfilenet

I need to process a number of dll's and exe files in a folder and determine what type of file I am dealing with: .NET, COM, Win32 or some other alien life form.

I've been trying to determine the easiest way to detect the type of a DLL, what do you think of this:

COM dll
=> I do a LoadLibrary, then GetProcAddress for "DllRegisterServer". If I get a valid return, it's a COM file.
.NET dll
=> If the dll depends on MSCOREE.DLL it's always a .NET dll?
Win32 dll
=> If both the above tests fail, it's a Win32 dll?

Surely there must be a better way to detect what type of dll we are dealing with. The above is very clunky, and won't work for EXE files? There must be some other way that I am not thinking of.

Ideally I'd like to be able to make the parser determine what compiler the file was compiled with, and what features it uses such as MFC, Atl, Stl etc… But I doubt that's possible in the pre-reflection era?

Best Answer

You must check the PE Header of these files. All DLL and executables, Win32 and .NET, have a PE header.

An In-Depth Look into the Win32 Portable Executable File Format

The .NET File Format

Portable Executable

Related Solutions

C# – How to calculate someone’s age based on a DateTime type birthday

An easy to understand and simple solution.

// Save today's date.
var today = DateTime.Today;

// Calculate the age.
var age = today.Year - birthdate.Year;

// Go back to the year in which the person was born in case of a leap year
if (birthdate.Date > today.AddYears(-age)) age--;

However, this assumes you are looking for the western idea of the age and not using East Asian reckoning.

Python – How to copy a file in Python

shutil has many methods you can use. One of which is:

from shutil import copyfile
copyfile(src, dst)

# 2nd option
copy(src, dst)  # dst can be a folder; use copy2() to preserve timestamp

Copy the contents of the file named src to a file named dst. Both src and dst need to be the entire filename of the files, including path.
The destination location must be writable; otherwise, an IOError exception will be raised.
If dst already exists, it will be replaced.
Special files such as character or block devices and pipes cannot be copied with this function.
With copy, src and dst are path names given as strs.

Another shutil method to look at is shutil.copy2(). It's similar but preserves more metadata (e.g. time stamps).

If you use os.path operations, use copy rather than copyfile. copyfile will only accept strings.

Best Answer

Related Solutions

C# – How to calculate someone’s age based on a DateTime type birthday

Python – How to copy a file in Python

Related Topic