Private Const STEAM_USING_FILESYSTEM As Integer = &H1
Private Const STEAM_USING_LOGGING As Integer = &H2
Private Const STEAM_USING_USERID As Integer = &H4
Private Const STEAM_USING_ACCOUNT As Integer = &H8
Private Const STEAM_USING_ALL As Integer = &HF

Private Enum eSteamError
    eSteamErrorNone = 0                                         'No Error
    eSteamErrorUnknown = 1
    eSteamErrorLibraryNotInitialized = 2
    eSteamErrorLibraryAlreadyInitialized = 3
    eSteamErrorConfig = 4
    eSteamErrorContentServerConnect = 5
    eSteamErrorBadHandle = 6
    eSteamErrorHandlesExhausted = 7
    eSteamErrorBadArg = 8
    eSteamErrorNotFound = 9
    eSteamErrorRead = 10
    eSteamErrorEOF = 11
    eSteamErrorSeek = 12
    eSteamErrorCannotWriteNonUserConfigFile = 13
    eSteamErrorCacheOpen = 14
    eSteamErrorCacheRead = 15
    eSteamErrorCacheCorrupted = 16
    eSteamErrorCacheWrite = 17
    eSteamErrorCacheSession = 18
    eSteamErrorCacheInternal = 19
    eSteamErrorCacheBadApp = 20
    eSteamErrorCacheVersion = 21
    eSteamErrorCacheBadFingerPrint = 22
    eSteamErrorNotFinishedProcessing = 23
    eSteamErrorNothingToDo = 24
    eSteamErrorCorruptEncryptedUserIDTicket = 25
    eSteamErrorSocketLibraryNotInitialized = 26
    eSteamErrorFailedToConnectToUserIDTicketValidationServer = 27
    eSteamErrorBadProtocolVersion = 28
    eSteamErrorReplayedUserIDTicketFromClient = 29
    eSteamErrorReceiveResultBufferTooSmall = 30
    eSteamErrorSendFailed = 31
    eSteamErrorReceiveFailed = 32
    eSteamErrorReplayedReplyFromUserIDTicketValidationServer = 33
    eSteamErrorBadSignatureFromUserIDTicketValidationServer = 34
    eSteamErrorValidationStalledSoAborted = 35
    eSteamErrorInvalidUserIDTicket = 36
    eSteamErrorClientLoginRateTooHigh = 37
    eSteamErrorClientWasNeverValidated = 38
    eSteamErrorInternalSendBufferTooSmall = 39
    eSteamErrorInternalReceiveBufferTooSmall = 40
    eSteamErrorUserTicketExpired = 41
    eSteamErrorCDKeyAlreadyInUseOnAnotherClient = 42
    eSteamErrorNotLoggedIn = 101
    eSteamErrorAlreadyExists = 102
    eSteamErrorAlreadySubscribed = 103
    eSteamErrorNotSubscribed = 104
    eSteamErrorAccessDenied = 105
    eSteamErrorFailedToCreateCacheFile = 106
    eSteamErrorCallStalledSoAborted = 107
    eSteamErrorEngineNotRunning = 108
    eSteamErrorEngineConnectionLost = 109
    eSteamErrorLoginFailed = 110
    eSteamErrorAccountPending = 111
    eSteamErrorCacheWasMissingRetry = 112
    eSteamErrorLocalTimeIncorrect = 113
    eSteamErrorNetwork = 200
End Enum

Private Enum EDetailedPlatformErrorType
    eNoDetailedErrorAvailable                               'No Error
    eStandardCerrno
    eWin32LastError
    eWinSockLastError
    eDetailedPlatformErrorCount
End Enum

Private Type TSteamError
    eSteamError As eSteamError                              'eSteamError code
    eDetailedErrorType As EDetailedPlatformErrorType        'Platform Error Type
    ErrCode As Long                                         'Error Code
    ErrDescription As String * 255                          'Additional Description
End Type

Private Type TSteamProgress
    intValid As Integer                                     'If 1 Percentage will be used
    intPercent As Integer                                   '0-100% (VAL)
    strProgress As String * 255                             'Additional Progress Info
End Type

'Platform API
Private Declare Function SteamStartEngine Lib "steam.dll" (ByRef SteamError As TSteamError) As Integer
Private Declare Function SteamStartup Lib "steam.dll" (ByVal intUsingMask As Integer, ByRef SteamError As TSteamError) As Integer

'Connection API
Private Declare Function SteamProcessCall Lib "steam.dll" (ByVal SteamHandle As Integer, ByRef pProgress As TSteamProgress, ByRef SteamError As TSteamError) As Integer

'Handle API
Private Declare Function SteamLogin Lib "steam.dll" (ByVal strUser As String, ByVal strPass As String, ByVal intSecure As Integer, ByRef SteamError As TSteamError) As Integer

Private Function ToBool(intNum As Integer) As Boolean
    If intNum = 1 Then ToBool = True
End Function

Private Function StartEngine() As Boolean
    Dim TError As TSteamError
   
    StartEngine = ToBool(SteamStartEngine(TError))
    If StartEngine = False Then
        MsgBox "Error (" & TError.eSteamError & "): " & TError.ErrDescription, vbOKOnly, "Steam Error: SteamStartEngine"
    End If
End Function

Private Function Startup() As Boolean
    Dim TError As TSteamError
   
    Startup = ToBool(SteamStartup(STEAM_USING_FILESYSTEM Or STEAM_USING_LOGGING Or STEAM_USING_USERID Or STEAM_USING_ACCOUNT, TError))
    If Startup = False Then
        MsgBox "Error (" & TError.eSteamError & "): " & TError.ErrDescription, vbOKOnly, "Steam Error: SteamStartup"
    End If
End Function

Private Function Login(strUser As String, strPass As String) As Boolean
    Dim TError As TSteamError
    Dim TProgress As TSteamProgress
    Dim intHandle As Integer
   
    intHandle = SteamLogin(strUser, strPass, 1, TError)
    Do While (SteamProcessCall(intHandle, TProgress, TError) = 0)
        DoEvents
    Loop
   
    If TError.eSteamError = eSteamErrorNone Then
        Login = True
    Else
        If Login = False Then MsgBox "Error (" & TError.eSteamError & "): " & TError.ErrDescription, vbOKOnly, "Steam Error: SteamLogin"
    End If
End Function

PrivateDeclare Function StartEngine Lib "Steam.dll" Alias "SteamStartEngine" () As Long
PrivateDeclare Function Startup Lib "Steam.dll" Alias "SteamStartup" (ByRef a1 As Long) As Long

Private Sub Startme_Click()
    Dim EngineH As Long
    Dim StartH As Long
    EngineH = StartEngine
    If EngineH = "0" Then
        'Unable to Start SteamEngine
        MsgBox "Unable to Start SteamEngine", vbOKOnly, "Error"
    Else
        StartH = Startup(EngineH)
        If StartH = "0" Then
            MsgBox "SteamStartup() failed: Steam Service cant Startup."
        Else
            MsgBox "SteamStartup() Returned 1: Steam service Startup complet."
        End If
    End If
End Sub