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Asked: 2026-05-11T12:50:46+00:00

I would like to deploy a .inf based USB driver with my installer. I

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I would like to deploy a .inf based USB driver with my installer.

I guess the .inf needs to be placed in %SystemRoot%\inf, but there is also a .cat (WHQL certification I guess?), and .sys files. What do I do with those?

EDIT: Resolved, thanks to the helpful answers. I was able to P/Invoke the function, so I have a post-install action which runs the following code:

namespace DriverPackageInstallAction {     static class Program     {         [DllImport('DIFXApi.dll', CharSet = CharSet.Unicode)]         public static extern Int32 DriverPackagePreinstall(string DriverPackageInfPath, Int32 Flags);          /// <summary>         /// The main entry point for the application.         /// </summary>         [STAThread]         static void Main()         {             DirectoryInfo assemblyDir = new DirectoryInfo(Application.ExecutablePath);             DirectoryInfo installDir = assemblyDir.Parent;              int result = DriverPackagePreinstall(installDir.FullName + @'\Driver\XYZ.inf', 0);             if (result != 0)                 MessageBox.Show('Driver installation failed.');         }     } }
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1 Answer

  1. I would start by reading about SetupAPI and DIFx. The Windows Driver Kit includes samples of both, including a DIFx-based merge module and a DIFx-based WiX library. The source for the command-line devcon utility, which is based on SetupAPI, is also included in the WDK samples.

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