Desktop Functions:

   Smart Device Functions:

Show Recent Changes
Subscribe (RSS)
Misc. Pages
Helpful Tools
Suggested Reading
Website TODO List
Support Forum
Download Visual Studio Add-In

Terms of Use
Privacy Policy
loadlibraryex (kernel32)

C# Signature:

[DllImport("kernel32.dll", SetLastError = true)]
static extern IntPtr LoadLibraryEx(string lpFileName, IntPtr hReservedNull, LoadLibraryFlags dwFlags);

VB.NET Signature:

<DllImport("kernel32.dll")> _
Private Shared Function LoadLibraryEx(lpFileName As String, hReservedNull As IntPtr, dwFlags As LoadLibraryFlags) As IntPtr
End Function

User-Defined Types:




Tips & Tricks:

If you only want to load resources from the library, specify LoadLibraryFlags.LoadLibraryAsDatafile as dwFlags. In this case, nothing is done to execute or prepare to execute the mapped file.

Sample Code:

[System.Runtime.InteropServices.DllImport("kernel32.dll", SetLastError = true)]
private static extern IntPtr LoadLibraryEx(string lpFileName, IntPtr hFile, uint dwFlags);
private static void LoadWin32Library(string libPath)
    System.IntPtr moduleHandle = LoadLibraryEx(libPath, IntPtr.Zero, 0);
    if (moduleHandle == IntPtr.Zero)
        throw new Win32Exception(Marshal.GetLastWin32Error());

Safe handle implementation for Libraries

using System.Runtime.InteropServices;

class NativeLibraryHandle : SafeHandle
    public NativeLibraryHandle(string filename, LoadLibraryFlags flags) : base(IntPtr.Zero, true)
       base.SetHandle(LoadLibraryEx(filename, IntPtr.Zero, flags));

    public override bool IsInvalid
       get { return this.handle == IntPtr.Zero; }

    protected override bool ReleaseHandle()
       return FreeLibrary(this.handle);

    [DllImport("kernel32.dll", SetLastError = true)]
    static extern IntPtr LoadLibraryEx(string lpFileName, IntPtr hReservedNull, LoadLibraryFlags dwFlags);

    [DllImport("kernel32.dll", SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    static extern bool FreeLibrary(IntPtr hModule);

Alternative Managed API:

Do you know one? Please contribute it!


Please edit this page!

Do you have...

  • helpful tips or sample code to share for using this API in managed code?
  • corrections to the existing content?
  • variations of the signature you want to share?
  • additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).

Access directly from VS:
Terms of Use
Edit This Page
Find References
Show Printable Version