C# Definition:

[StructLayout(LayoutKind.Sequential)]
public struct BrowseInfo
{
    public IntPtr hwndOwner;
    public IntPtr pidlRoot;
    [Out] public StringBuilder displayname;
    public string title;
    public int flags;
    public BrowseCallBackProc callback;
    public IntPtr lparam;
    public int iImage;
}

User-Defined Field Types:

BrowseCallbackProc

Notes:

Flags:

const readonly int BIF_BROWSEFORCOMPUTER  = 0x1000;  // Browsing for Computers
const readonly int BIF_BROWSEFORPRINTER   = 0x2000;  // Browsing for Printers
const readonly int BIF_BROWSEINCLUDEFILES = 0x4000;  // Browsing for Everything
const readonly int BIF_RETURNONLYFSDIRS = 1;  // For finding a folder to start document searching
const readonly int BIF_DONTGOBELOWDOMAIN = 2;  // For starting the Find Computer
const readonly int BIF_STATUSTEXT = 4;
const readonly int BIF_RETURNFSANCESTORS = 8;
const readonly int BIF_EDITBOX = 16;
const readonly int BIF_VALIDATE = 32;