How to know DLL code is managed code or unmanaged ex .- kernel32.dll is managed or unmanaged......?

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I Know the theory of managed and unmanaged code but how to know that dll which im using is managed or unmanaged

kernel32.dll

this dll im using in my project i want to know that dll is managed or unmanaged

What I have tried:

[DllImport("advapi32.dll", EntryPoint = "CreateProcessAsUser", SetLastError = true, CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
public extern static bool CreateProcessAsUser(IntPtr hToken, String lpApplicationName, String lpCommandLine, ref SECURITY_ATTRIBUTES lpProcessAttributes,
    ref SECURITY_ATTRIBUTES lpThreadAttributes, bool bInheritHandle, int dwCreationFlags, IntPtr lpEnvironment,
    String lpCurrentDirectory, ref STARTUPINFO lpStartupInfo, out PROCESS_INFORMATION lpProcessInformation);

Posted 11-Jul-17 2:08am

Member 12938546

Updated 11-Jul-17 3:10am

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KarstenK · Answer 1 · 2017-07-11T02:27:00

Solution 1

You must know from which source the dll is. In the Micorsoft documentation you can read that it belongs to Windows.

Here is also some detailed explanation of the usage of CreateProcessAsUser with the net-framework. Read it carefully!!!

Posted 11-Jul-17 2:27am

KarstenK

OriginalGriff · Answer 2 · 2017-07-11T02:28:00

You can't tell without knowing from the name, or actually "looking" at the contents.

But ... if it needs a DllImport decoration, then it's not managed - DllImport is the mechanism for accessing unmanaged DLLs.

And kernel32.dll is definitely unmanaged - it's part of Windows.

If you want to check, try to add the file as a reference to your project - if it adds ok, it's managed. If it doesn't, it's unmanaged (or corrupt).

Pete O'Hanlon · Answer 3 · 2017-07-11T03:10:00

The way to know whether an assembly is managed or unmanaged relates to something called the PE Header (Portable Executable). This is a standard file header for binary Windows executable code (be it an exe or a dll). The details about whether or not it's managed or not is contained in this header. There's an excellent set of articles on this format starting here Anatomy of a .NET Assembly - PE Headers - Simple Talk[^]. If I were you. I'd have a read of this.

How to know DLL code is managed code or unmanaged ex .- kernel32.dll is managed or unmanaged......?

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