Question

I need to do the same as the C# .net code below in C++ MFC
can you guys help me out?

using System;
using System.Text;
using System.Runtime.InteropServices;

namespace ConsoleApplication1
{
    class Program
    {
        [DllImport("shell32.dll", EntryPoint = "#261",
            CharSet = CharSet.Unicode, PreserveSig = false)]
        public static extern void GetUserTilePath(
          string username, 
          UInt32 whatever, // 0x80000000
          StringBuilder picpath, int maxLength);

        public static string GetUserTilePath(string username)
        {   // username: use null for current user
            var sb = new StringBuilder(1000);
            GetUserTilePath(username, 0x80000000, sb, sb.Capacity);
            return sb.ToString();
        }

        [STAThread]
        static void Main(string[] args)
        {
            string path =GetUserTilePath(null);
            Console.WriteLine("path = %s", path);
        }
    }
}

I cant get to the GetProcAddress from the #261 (or 261) entry point and/or its exactly signature to C++.

EDIT: Here is the Trick

HMODULE shell32Dll= ::LoadLibrary(L"shell32.dll");


HRESULT (__stdcall *getUserImage)(LPCWSTR userName,
                        DWORD zero , LPWSTR outPath, UINT size);

(FARPROC&)getUserImage = ::GetProcAddress(shell32Dll, MAKEINTRESOURCEA(261));
if(getUserImage)
{
        WCHAR outPath[MAX_PATH];
        getUserImage(NULL,0x80000000,outPath,MAX_PATH);
}

MAKEINTRESOURCEA(261) instead of “#261” or “261” make get the job done!

Thank you! Cameron!

Answer 1

From the GetProcAddr documentation:

lpProcName [in]
The function or variable name, or the function’s ordinal value. If this parameter is an ordinal value, it must be in the low-order word; the high-order word must be zero.

It turns out you should be calling it like so:

(FARPROC&)getUserImage = ::GetProcAddress(shell32Dll, MAKEINTRESOURCE(261));