wsh_vbs_gui_via_mshta_createwindow_with_events_handlers.vbs

Option Explicit

' Base64-encoded background image
Const BGI = "data:image/png;base64,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"

Dim aItems, i

' Array containing items for ListBox
aItems = Array("Item A", "Item B", "Item C", "Item D", "Item E")

' Create HTA window wrapper
With New clsSmallWrapperForm
    ' Setup window
    .ShowInTaskbar = "yes"
    .Title = "Test HTA UserForm"
    .BackgroundImage = BGI
    .Width = 354
    .Height = 118
    .Visible = False
    ' Create window
    .Create
    ' Assign handlers
    Set .Handlers = New clsSmallWrapperHandlers
    ' Add ListBox
    With .AddElement("ListBox1", "SELECT")
        .size = 6
        .multiple = True
        .style.left = "15px"
        .style.top = "10px"
        .style.width = "250px"
    End With
    .AppendTo "Form"
    ' Add ListBox items
    For i = 0 To UBound(aItems)
        .AddElement , "OPTION"
        .AddText aItems(i)
        .AppendTo "ListBox1"
    Next
    ' Add OK Button
    With .AddElement("Button1", "INPUT")
        .type = "button"
        .value = "OK"
        .style.left = "285px"
        .style.top = "10px"
        .style.width = "50px"
        .style.height = "20px"
    End With
    .AppendTo "Form"
    ' Add Cancel Button
    With .AddElement("Button2", "INPUT")
        .type = "button"
        .value = "Cancel"
        .style.left = "285px"
        .style.top = "40px"
        .style.width = "50px"
        .style.height = "20px"
    End With
    .AppendTo "Form"
    ' Add Label
    With .AddElement("Label1", "SPAN")
        .style.left = "15px"
        .style.top = "98px"
        .style.width = "350px"
    End With
    .AddText "Choose items"
    .AppendTo "Form"
    ' Show window
    .Visible = True
    ' Wait window closing or user choise
    Do While .ChkDoc And Not .Handlers.Selected
        WScript.Sleep 100
    Loop
    ' Read results from array .Handlers.SelectedItems
    If .Handlers.Selected Then
        MsgBox "Selected " & (UBound(.Handlers.SelectedItems) + 1) & " Item(s)" & vbCrLf & Join(.Handlers.SelectedItems, vbCrLf)
    Else
        MsgBox "Window closed"
    End If
    ' The rest part of code ...

End With

Class clsSmallWrapperHandlers

    ' Handlers class implements events processing
    ' Edit code to provide the necessary behavior
    ' Keep conventional VB handlers names: Public Sub <ElementID>_<EventName>()

    Public oswForm ' mandatory property

    Public Selected
    Public SelectedItems

    Private Sub Class_Initialize()
        Selected = False
        SelectedItems = Array()
    End Sub

    Public Sub ListBox1_Click()
        Dim vItem
        With CreateObject("Scripting.Dictionary")
            For Each vItem In oswForm.Window.ListBox1.childNodes
                If vItem.Selected Then .Item(vItem.innerText) = ""
            Next
            SelectedItems = .Keys()
        End With
        oswForm.Window.Label1.style.color = "buttontext"
        oswForm.Window.Label1.innerText = (UBound(SelectedItems) + 1) & " selected"
    End Sub

    Public Sub Button1_Click()
        Selected = UBound(SelectedItems) >= 0
        If Selected Then
            oswForm.Window.close
        Else
            oswForm.Window.Label1.style.color = "darkred"
            oswForm.Window.Label1.innerText = "Choose at least 1 item"
        End If
    End Sub

    Public Sub Button2_Click()
        oswForm.Window.close
    End Sub

End Class

Class clsSmallWrapperForm

    ' Utility class for HTA window functionality
    ' Do not modify

    ' HTA tag properties
    Public Border ' thick | dialog | none | thin
    Public BorderStyle ' normal | complex | raised | static | sunken
    Public Caption ' yes | no
    Public ContextMenu ' yes | no
    Public Icon ' path
    Public InnerBorder ' yes | no
    Public MinimizeButton ' yes | no
    Public MaximizeButton ' yes | no
    Public Scroll ' yes | no | auto
    Public Selection ' yes | no
    Public ShowInTaskbar ' yes | no
    Public SysMenu ' yes | no
    Public WindowState ' normal | minimize | maximize

    ' Form properties
    Public Title
    Public BackgroundImage
    Public Width
    Public Height
    Public Left
    Public Top
    Public Self

    Dim oWnd
    Dim oDoc
    Dim bVisible
    Dim oswHandlers
    Dim oLastCreated

    Private Sub Class_Initialize()
        Set Self = Me
        Set oswHandlers = Nothing
        Border = "thin"
        ContextMenu = "no"
        InnerBorder = "no"
        MaximizeButton = "no"
        Scroll = "no"
        Selection = "no"
    End Sub

    Private Sub Class_Terminate()
        On Error Resume Next
        oWnd.Close
    End Sub

    Public Sub Create()
        ' source http://forum.script-coding.com/viewtopic.php?pid=75356#p75356
        Dim sName, sAttrs, sSignature, oShellWnd, oProc
        sAttrs = ""
        For Each sName In Array("Border", "Caption", "ContextMenu", "MaximizeButton", "Scroll", "Selection", "ShowInTaskbar", "Icon", "InnerBorder", "BorderStyle", "SysMenu", "WindowState", "MinimizeButton")
            If Eval(sName) <> "" Then sAttrs = sAttrs & " " & sName & "=" & Eval(sName)
        Next
        If Len(sAttrs) >= 240 Then Err.Raise 450, "<HTA:APPLICATION" & sAttrs & " />"
        sSignature = Mid(Replace(CreateObject("Scriptlet.TypeLib").Guid, "-", ""), 2, 16)
        Set oProc = CreateObject("WScript.Shell").Exec("mshta ""about:<script>moveTo(-32000,-32000);document.title='*'</script><hta:application" & sAttrs & " /><object id='s' classid='clsid:8856F961-340A-11D0-A96B-00C04FD705A2'><param name=RegisterAsBrowser value=1></object><script>s.putProperty('" & sSignature & "',document.parentWindow);</script>""")
        Do
            If oProc.Status > 0 Then Err.Raise 507, "mshta.exe"
            For Each oShellWnd In CreateObject("Shell.Application").Windows
                On Error Resume Next
                Set oWnd = oShellWnd.GetProperty(sSignature)
                If Err.Number = 0 Then
                    On Error Goto 0
                    With oWnd
                        Set oDoc = .document
                        With .document
                            .open
                            .close
                            .title = Title
                            .getElementsByTagName("head")(0).appendChild .createElement("style")
                            .styleSheets(0).cssText = "* {font:8pt tahoma;position:absolute;}"
                            .getElementsByTagName("body")(0).id = "Form"
                        End With
                        .Form.style.background = "buttonface"
                        If BackgroundImage <> "" Then
                            .Form.style.backgroundRepeat = "no-repeat"
                            .Form.style.backgroundImage = "url(" & BackgroundImage & ")"
                        End If
                        If IsEmpty(Width) Then Width = .Form.offsetWidth
                        If IsEmpty(Height) Then Height = .Form.offsetHeight
                        .resizeTo .screen.availWidth, .screen.availHeight
                        .resizeTo Width + .screen.availWidth - .Form.offsetWidth, Height + .screen.availHeight - .Form.offsetHeight
                        If IsEmpty(Left) Then Left = CInt((.screen.availWidth - Width) / 2)
                        If IsEmpty(Top) Then Top = CInt((.screen.availHeight - Height) / 2)
                        bVisible = IsEmpty(bVisible) Or bVisible
                        Visible = bVisible
                        .execScript "var smallWrapperThunks = (function(){" &_
                            "var thunks,elements={};return {" &_
                                "parseHandlers:function(h){" &_
                                    "thunks=h;for(var key in thunks){var p=key.toLowerCase().split('_');if(p.length==2){elements[p[0]]=elements[p[0]]||{};elements[p[0]][p[1]]=key;}}}," &_
                                "forwardEvents:function(e){" &_
                                    "if(elements[e.id.toLowerCase()]){for(var key in e){if(key.search('on')==0){var q=elements[e.id.toLowerCase()][key.slice(2)];if(q){eval(e.id+'.'+key+'=function(){thunks.'+q+'()}')}}}}}}})()"
                        If Not oswHandlers Is Nothing Then
                            .smallWrapperThunks.parseHandlers oswHandlers
                            .smallWrapperThunks.forwardEvents .Form
                        End If
                    End With
                    Exit Sub
                End If
                On Error Goto 0
            Next
            WScript.Sleep 100
        Loop
    End Sub

    Public Property Get Handlers()
        Set Handlers = oswHandlers
    End Property

    Public Property Set Handlers(oHandlers)
        Dim oElement
        If Not oswHandlers Is Nothing Then Set oswHandlers.oswForm = Nothing
        Set oswHandlers = oHandlers
        Set oswHandlers.oswForm = Me
        If ChkDoc Then
            oWnd.smallWrapperThunks.parseHandlers oswHandlers
            For Each oElement In oDoc.all
                If oElement.id <> "" Then oWnd.smallWrapperThunks.forwardEvents oElement
            Next
        End If
    End Property

    Public Sub ForwardEvents(oElement)
        If ChkDoc Then oWnd.smallWrapperThunks.forwardEvents oElement
    End Sub

    Public Function AddElement(sId, sTagName)
        Set oLastCreated = oDoc.createElement(sTagName)
        If VarType(sId) <> vbError Then
            If Not(IsNull(sId) Or IsEmpty(sId)) Then oLastCreated.id = sId
        End If
        oLastCreated.style.position = "absolute"
        Set AddElement = oLastCreated
    End Function

    Public Function AppendTo(vNode)
        If Not IsObject(vNode) Then Set vNode = oDoc.getElementById(vNode)
        vNode.appendChild oLastCreated
        ForwardEvents oLastCreated
        Set AppendTo = oLastCreated
    End Function

    Public Function AddText(sText)
        oLastCreated.appendChild oDoc.createTextNode(sText)
    End Function

    Public Property Get Window()
        Set Window = oWnd
    End Property

    Public Property Get Document()
        Set Document = oDoc
    End Property

    Public Property Get Visible()
        Visible = bVisible
    End Property

    Public Property Let Visible(bWindowVisible)
        bVisible = bWindowVisible
        If ChkDoc Then
            If bVisible Then
                oWnd.moveTo Left, Top
            Else
                oWnd.moveTo -32000, -32000
            End If
        End If
    End Property

    Public Function ChkDoc()
        On Error Resume Next
        ChkDoc = CBool(TypeName(oDoc) = "HTMLDocument")
    End Function

End Class