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Thread: register control before using it in project

  1. #1

    Thread Starter
    Junior Member
    Join Date
    Oct 2015
    Posts
    26

    register control before using it in project

    Hi, im writing updates to demo game which uses .ocx control and aditional .dll's. have made this this way:

    Code:
    Option Explicit
    Private Declare Function SetCurrentDirectory Lib "kernel32" _
    Alias "SetCurrentDirectoryA" (ByVal lpPathName As String) As Long
    Private Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hWnd As Long, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As Long
    Private Declare Function GetSystemDirectory Lib "kernel32" Alias "GetSystemDirectoryA" (ByVal lpBuffer As String, ByVal nSize As Long) As Long
    Dim OSBits
    Dim sSave As String, Ret As Long
    Private Sub Form_Load()
    sSave = Space(255)
    Ret = GetSystemDirectory(sSave, 255)
    sSave = Trim(Left$(sSave, Ret - 9))
    OSBits = IIf(Len(Environ$("PROGRAMFILES(X86)")) > 0, 64, 32)
    'SetCurrentDirectory App.path + "\library1"
    
    If OSBits = 64 Then
    
    
    CopyFiles App.path & "\library1", sSave + "\syswow64"
    
    
    On Error Resume Next
    SetCurrentDirectory sSave + "\syswow64"
    
    
    ShellExecute 0, "runas", "regsvr32", "dx7vb.dll /s", vbNullString, 1
    ShellExecute 0, "runas", "regsvr32", "rmcontrol.ocx /s", vbNullString, 1
    End If
    
    If OSBits = 32 Then
    
    On Error Resume Next
    CopyFiles App.path & "\library1", sSave + "\System32"
    
    
    
    SetCurrentDirectory sSave + "\System32"
    
    
    MRRegisterLibrary "dx7vb.dll /s"
    MRRegisterLibrary "rmcontrol.ocx /s"
    End If
    
    Timer1.Enabled = True
    
    End Sub
    Public Function MRRegisterLibrary(path$)
    Shell "Regsvr32.exe " & path$, vbHide
    End Function
    
    Private Sub Timer1_Timer()
    SetCurrentDirectory App.path
    Shell App.path + "\library2\game.exe"
    End
    End Sub
    
    Public Function CopyFiles(ByRef strSource As String, ByRef strDestination As String)
            On Error Resume Next
            Dim objfso
            Set objfso = CreateObject("Scripting.FileSystemObject")
            Dim strFile As String
            If Right$(strSource, 1) <> "\" Then strSource = strSource & "\"
            If Right$(strDestination, 1) <> "\" Then strDestination = strDestination & "\"
     
            strFile = Dir(strSource & "*.*")
            Do While Len(strFile)
                With objfso
                   If Not .FolderExists(strDestination) Then .CreateFolder (strDestination)
                        .CopyFile strSource & strFile, strDestination & strFile
                End With
                strFile = Dir
            Loop
            Set objfso = Nothing
            Exit Function
    
        End Function
    added also manifest to executable to be sure,

    Code:
    <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
    <assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
        <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
            <security>
                <requestedPrivileges>
                    <requestedExecutionLevel level="requireAdministrator" uiAccess="false"/>
                </requestedPrivileges>
            </security>
        </trustInfo>
    </assembly>
    i am still not persuaded if it solved opening with components:/

    anyone can have sugestions?
    Last edited by Krzysztof#; Oct 20th, 2017 at 04:40 AM.

  2. #2
    PowerPoster
    Join Date
    Feb 2006
    Posts
    18,571

    Re: register control before using it in project

    This is very unsafe for numerous reasons.

    An installer is supposed to check to see if an ActiveX library (OCX or DLL) has already been installed. If so, then it should just use it, if not then it should place the file into the location defined within the corresponding .DEP file provided by the author and then register the library. For this process to succeed without problems the installer must run with elevated privileges.

    If you try to have your program do this there are hazards. One is that if it runs as a standard user dropping such a file and registering it are both likely to fail since protected locations are generally involved. If you have no Vista-aware manifest the failure will be intercepted and virtualized and Windows will let your program proceed. From there it may work or this may cause additional headaches now or down the road, for other programs as well as yours. If you do have such a manifest you will get an error 70 or something similar.

    One way around this involves far more complex manifests, forming private assemblies with activation context information. Only then is it safe for your program to have private copies of such ActiveX libraries and use them without elevated registration.


    You don't need any SetCurrentDirectory API call. The VB ChDir statement does this.

  3. #3

    Thread Starter
    Junior Member
    Join Date
    Oct 2015
    Posts
    26

    Re: register control before using it in project

    You don't need any SetCurrentDirectory API call. The VB ChDir statement does this.
    Great, thanks

    You are right, i get 'copy oryginal files' message in windows xp, windows 10 icons are with administrator privileges but still not all files are copied with first run. windows 7 at start also shows Attachment 152939

    Other than Package & Deployment Wizard or Inno Setup Compiler what other installers may be good for this?
    Last edited by Krzysztof#; Oct 21st, 2017 at 11:37 PM.

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