Attribute VB_Name = "Module1"
Option Explicit

Global menum As STATUS

Private Declare Function LoadLibraryRegister Lib "kernel32" Alias "LoadLibraryA" (ByVal lpLibFileName As String) As Long

Private Declare Function FreeLibraryRegister Lib "kernel32" Alias "FreeLibrary" (ByVal hLibModule As Long) As Long

Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long

Private Declare Function GetProcAddressRegister Lib "kernel32" Alias "GetProcAddress" (ByVal hModule As Long, ByVal lpProcName As String) As Long

Private Declare Function CreateThreadForRegister Lib "kernel32" Alias "CreateThread" (lpThreadAttributes As Any, ByVal dwStackSize As Long, ByVal lpStartAddress As Long, ByVal lpparameter As Long, ByVal dwCreationFlags As Long, lpThreadID As Long) As Long

Private Declare Function WaitForSingleObject Lib "kernel32" (ByVal hHandle As Long, ByVal dwMilliseconds As Long) As Long

Private Declare Function GetExitCodeThread Lib "kernel32" (ByVal hThread As Long, lpExitCode As Long) As Long

Private Declare Sub ExitThread Lib "kernel32" (ByVal dwExitCode As Long)

Private Const STATUS_WAIT_0 = &H0

Private Const WAIT_OBJECT_0 = ((STATUS_WAIT_0) + 0)

Public Enum REGISTER_FUNCTIONS

  DllRegisterServer = 1
  
  DllUnRegisterServer = 2
    
End Enum

Public Enum STATUS

   [File Could Not Be Loaded Into Memory Space] = 1
   
   [Not A Valid ActiveX Component] = 2
   
   [ActiveX Component Registration Failed] = 3
   
   [ActiveX Component Registered Successfully] = 4
   
   [ActiveX Component UnRegistered Successfully] = 5
   
End Enum

Public Function RegisterComponent(ByVal FileName$, ByVal RegFunction As REGISTER_FUNCTIONS) As STATUS

  Dim lngLib&, lngProcAddress&, lpThreadID&, fSuccess&, dwExitCode&, hThread&

  If FileName = "" Then Exit Function

  lngLib = LoadLibraryRegister(FileName)
  
  If lngLib = 0 Then
    
     RegisterComponent = [File Could Not Be Loaded Into Memory Space]
     Exit Function

  End If

  Select Case RegFunction

    Case REGISTER_FUNCTIONS.DllRegisterServer
       
         lngProcAddress = GetProcAddressRegister(lngLib, "DllRegisterServer")
  
    Case REGISTER_FUNCTIONS.DllUnRegisterServer
       
         lngProcAddress = GetProcAddressRegister(lngLib, "DllUnregisterServer")
    
    Case Else

  End Select

  If lngProcAddress = 0 Then
   
     RegisterComponent = [Not A Valid ActiveX Component]
     
     If lngLib Then Call FreeLibraryRegister(lngLib)
        
        Exit Function
      
     Else
   
       hThread = CreateThreadForRegister(ByVal 0&, 0&, ByVal lngProcAddress, ByVal 0&, 0&, lpThreadID)
     
       If hThread Then
        
          fSuccess = (WaitForSingleObject(hThread, 10000) = WAIT_OBJECT_0)
          
          If Not fSuccess Then
           
             Call GetExitCodeThread(hThread, dwExitCode)
             
             Call ExitThread(dwExitCode)
           
             RegisterComponent = [ActiveX Component Registration Failed]
           
             If lngLib Then Call FreeLibraryRegister(lngLib)
             
             Exit Function
          
          Else
            
             If RegFunction = DllRegisterServer Then
                
                RegisterComponent = [ActiveX Component Registered Successfully]
             
             ElseIf RegFunction = DllUnRegisterServer Then
                
                RegisterComponent = [ActiveX Component UnRegistered Successfully]
             
             End If
          
          End If
          
          Call CloseHandle(hThread)
          
          If lngLib Then Call FreeLibraryRegister(lngLib)
   
    End If

 End If

End Function