HTML/VBA Auto-Email at a Specific Time - html

Question

I am trying to get my VBA/HTML to automatically send emails at a specific time, however as the time I have it set to test at comes and goes, nothing happens. When I go to activate it manually, the debugger highlights the time value and says "invalid outside procedure". I am new to VBA and was wondering if anyone could help?
Application.OnTime TimeValue("14:31:00"), Procedure = "RangetoHTML"
Function RangetoHTML(rng As Range)
' Working in Office 2000-2016
Dim fso As Object
Dim ts As Object
Dim TempFile As String
Dim TempWB As Workbook
TempFile = Environ$("temp") & "\" & Format(Now, "dd-mm-yy h-mm-ss") & ".htm"
'Copy the range and create a new workbook to past the data in
rng.Copy
Set TempWB = Workbooks.Add(1)
With TempWB.Sheets(1)
.Cells(1).PasteSpecial Paste:=8
.Cells(1).PasteSpecial xlPasteValues, , False, False
.Cells(1).PasteSpecial xlPasteFormats, , False, False
.Cells(1).Select
Application.CutCopyMode = False
On Error Resume Next
.DrawingObjects.Visible = True
.DrawingObjects.Delete
On Error GoTo 0
End With
'Publish the sheet to a htm file
With TempWB.PublishObjects.Add( _
SourceType:=xlSourceRange, _
Filename:=TempFile, _
Sheet:=TempWB.Sheets(1).Name, _
Source:=TempWB.Sheets(1).UsedRange.Address, _
HtmlType:=xlHtmlStatic)
.Publish (True)
End With
'Read all data from the htm file into RangetoHTML
Set fso = CreateObject("Scripting.FileSystemObject")
Set ts = fso.GetFile(TempFile).OpenAsTextStream(1, -2)
RangetoHTML = ts.readall
ts.Close
RangetoHTML = Replace(RangetoHTML, "align=center x:publishsource=", _
"align=left x:publishsource=")
'Close TempWB
TempWB.Close savechanges:=False
'Delete the htm file we used in this function
Kill TempFile
Set ts = Nothing
Set fso = Nothing
Set TempWB = Nothing
End Function
Sub AutoEmail()
' You need to use this module with the RangetoHTML subroutine.
' Working in Office 2000-2016
Dim rng As Range
Dim OutApp As Object
Dim OutMail As Object
Set rng = Nothing
On Error Resume Next
' Only send the visible cells in the selection.
Set rng = Sheets("emailtest").Range("A10:E39").SpecialCells(xlCellTypeVisible) ' Change this
On Error GoTo 0
If rng Is Nothing Then
MsgBox "The selection is not a range or the sheet is protected. " & _
vbNewLine & "Please correct and try again.", vbOKOnly
Exit Sub
End If
With Application
.EnableEvents = False
.ScreenUpdating = False
End With
Set OutApp = CreateObject("Outlook.Application")
Set OutMail = OutApp.CreateItem(0)
On Error Resume Next
With OutMail
.To = Range("C6").Value ' Change this to the email addresses you want to send to
.CC = ""
.BCC = ""
.Subject = Date & " " & "Daily MCAPS Part Update" ' Add in a subject
.HTMLBody = Range("C5").Value
' In place of the following statement, you can use ".Display" to
' display the e-mail message.
.Send
End With
On Error GoTo 0
With Application
.EnableEvents = True
.ScreenUpdating = True
End With
Set OutMail = Nothing
Set OutApp = Nothing
End Sub

Answer 1

Your function Function RangetoHTML(rng As Range) needs a parameter. So, it must be passed when it is called. But I do not have the knowledge to be possible to directly send an object like parameter and you must make a kind of trick. The function parameter must be declared As String and the range address will be sent and the range will be built inside the function. Something like this:
Function RangetoHTML(rngAdd As String)
Dim rng As Range
Set rng = Range(rngAdd)
'then use it like you need
End Function
And the function will be called in this way:
Application.OnTime TimeValue("14:31:00"), "'RangetoHTML """ & rng.address & "'"