This may be doable. I was screwing around with it and I got PEID to load my DLL but when you try to activate it it crashes PEID. It will take some post-compiling file editing though. I'll give you a basic idea of what I did.

First off, this page will describe how to create a real DLL in VB. It's not hard.
http://www.vb-helper.com/howto_make_standard_dll.html

Here is what I have in my module.

Option Explicit 
Public Const DLL_PROCESS_DETACH = 0 
Public Const DLL_PROCESS_ATTACH = 1 
Public Const DLL_THREAD_ATTACH = 2 
Public Const DLL_THREAD_DETACH = 3 

Public Function DllMain(hInst As Long, fdwReason As Long, lpvReserved As Long) As Boolean 
   Select Case fdwReason 
      Case DLL_PROCESS_DETACH 
      Case DLL_PROCESS_ATTACH 
            DllMain = True 
      Case DLL_THREAD_ATTACH 
      Case DLL_THREAD_DETACH 
    End Select 
End Function 

Public Function LoadDll() 
    LoadDll = "VB PEID Plugin v1" 
End Function 

Public Function DoMyJob(hMainDlg As Long, szFname As String, lpReserved As String, lpParam As String) As Boolean 
    '//hMainDlg: HWND of PEiD window 
    '//szFname: Filename 
    '//lpReserved: PEiD passes 'PEiD' as the value 
    '//lpParam: NULL passed, for future use 
  
    '// Write your main code here 

    MsgBox "Plugin activated!" 
    
    DoMyJob = True 
End Function

That's all there is to the code. As you can see it only message boxes but still. Then you need a DEF file so that the linker will export the function.

NAME VBPEIDPlugin 
LIBRARY VBPEIDPlugin 
DESCRIPTION "VB PEID Plugin" 
EXPORTS   DllMain @1 
      LoadDll @2 
      DoMyJob @3 

Now, as for the file modification you have to do.. If you try to load the Plugin as it is you will notice that the name of the plugin (in the plugin menu) shows up as V. This is because of the way VB stores stuff. "V B P E I D P l u g i n". With null bytes (00) in between each letter. I'm not sure why this messes up PEID but it does. Open your plugin DLL in a hex editor, find the name of it and change it to something like this... "VB PEID Plugin " Take out the null bytes and add them back on after the end of your plugin title. Now PEID will show your plugin name correctly. That's as far as I got because I got distracted but if anyone takes it further let me know.

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