Acquiring an icon of a program using its handle

I am looking for a way to extract a program's icon from its handle, which I acquired using User32.dll with EnumWindow/FindWindow. While I am aware of ExtractAssociatedIcon, it seems to work from a file instead of a handle. My question is how can I convert a handle to a file location in order to obtain an icon.

The goal is to translate this code into JavaScript using node-ffi for my npm module node-hide, which I created for hiding and showing Windows programs. Using a DLL would be the most convenient option, but a C/C# solution would also suffice. I simply need some guidance on how to proceed. Thank you.

javascriptc#node.jswindowsnode-ffi

Answer №1

If you're working in C#, there is a handy shell32.dll function that can be utilized.

Here's the snippet of code:

// Required namespaces.
using System;
using System.Drawing;
using System.Reflection;
using System.Runtime.InteropServices;

// Import the function.
[DllImport("shell32.dll", EntryPoint="ExtractAssociatedIcon")]
public static extern IntPtr ExtractAssociatedIcon(IntPtr hInst, string lpIconPath, out ushort lpiIcon);

// Now retrieve the icon.
ushort uicon;
IntPtr handle = ExtractAssociatedIcon(this.Handle, Assembly.GetExecutingAssembly().Location, out uicon);
Icon ico = Icon.FromHandle(handle);

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