Smooth running marquee text in excel - vba

Question

I am creating a marquee text in Excel 2013. As the Microsoft Web Browser Control doesn't work in Excel 2013 and 2016, so I used the following VBA code:
Sub DoMarquee()
Dim sMarquee As String
Dim iWidth As Integer
Dim iPosition As Integer
Dim rCell As Range
Dim iCurPos As Integer
'Set the message to be displayed in this cell
sMarquee = "This is a scrolling Marquee."
'Set the cell width (how many characters you want displayed at once
iWidth = 10
'Which cell are we doing this in?
Set rCell = Sheet1.Range("M2")
'determine where we are now with the message. InStr will return the position
' of the first character where the current cell value is in the marquee message
iCurPos = InStr(1, sMarquee, rCell.Value)
'If we are position 0, then there is no message, so start over
' otherwise, bump the message to the next characterusing mid
If iCurPos = 0 Then
'Start it over
rCell.Value = Mid(sMarquee, 1, iWidth) Else
'bump it
rCell.Value = Mid(sMarquee, iCurPos + 1, iWidth)
End If
'Set excel up to run this thing again in a second or two or whatever
Application.OnTime Now + TimeValue("00:00:01"), "DoMarquee"
End Sub
It is reflecting in excel every second, is there a way to reflect in milliseconds so that it can show some smooth running. And more issue is, it again starts only after scrolling completely. Is there anyway to make it in a scroll continuously with waiting for the entire text to scroll.

Answer 1

For your sub second functionality use an API call.
Option Explicit
Private Declare PtrSafe Sub Sleep Lib "kernel32" (ByVal dwMilliseconds As Long)
Public Sub DoMarquee()
Dim sMarquee As String
Dim iWidth As Long
Dim iPosition As Long
Dim rCell As Range
Dim iCurPos As Long
sMarquee = "This is a scrolling Marquee."
iWidth = 10
Set rCell = Sheet1.Range("M2")
iCurPos = InStr(1, sMarquee, rCell.Value)
If iCurPos = 0 Then
rCell.Value = Mid(sMarquee, 1, iWidth)
Else
rCell.Value = Mid(sMarquee, iCurPos + 1, iWidth)
End If
Sleep 100
Application.Run "DoMarquee"
End Sub
Drop the PtrSafe if on 32 bit machine so becomes:
Private Declare Sub Sleep Lib "kernel32" (ByVal dwMilliseconds As Long)
Edit:
1) A number of users have noted out of stack space messages to frequency of calls.
#Sorceri has correctly pointed out you can re-work as:
Set rCell = Nothing
DoEvents
Sleep 100
Application.OnTime Now, "DoMarquee"
2) I was unaware of the letter by letter part so I will refer you to his/her answer on the pulling of iWidth into global variable.
That in mind, you may wish to amend the following to take account of #Sorceri's iWidth; I have the following version 2 "fudge" for the hyperlink, amended for out-of-stack, and which includes a test for 32 v 64 bit versions to ensure compatibility. More info on compatibility here.
Version 2:
Option Explicit
#If Win64 Then
Private Declare PtrSafe Sub Sleep Lib "kernel32" (ByVal dwMilliseconds As Long)
#Else
Private Declare Sub Sleep Lib "kernel32" (ByVal dwMilliseconds As Long)
#End If
Public Sub DoMarquee()
Dim sMarquee As String
Dim iWidth As Long
Dim iPosition As Long
Dim rCell As Range
Dim iCurPos As Long
sMarquee = "This is a scrolling Marquee."
iWidth = 10
Set rCell = Sheet1.Range("M2")
rCell.Parent.Hyperlinks.Add Anchor:=rCell, Address:="https://www.google.co.uk/", TextToDisplay:=rCell.Text
rCell.Font.ThemeColor = xlThemeColorDark1
iCurPos = InStr(1, sMarquee, rCell.Value)
If iCurPos = 0 Then
rCell.Value = Mid(sMarquee, 1, iWidth)
rCell.Hyperlinks(1).TextToDisplay = rCell.Text
FormatCell rCell
Else
rCell.Value = Mid(sMarquee, iCurPos + 1, iWidth)
On Error Resume Next
rCell.Hyperlinks(1).TextToDisplay = rCell.Text
On Error GoTo 0
FormatCell rCell
End If
Set rCell = Nothing
DoEvents
Sleep 100
Application.OnTime Now, "DoMarquee"
End Sub
Public Sub FormatCell(ByVal rng As Range)
With rng.Font
.Name = "Calibri"
.Size = 11
.Underline = xlUnderlineStyleSingle
.Color = 16711680
End With
End Sub

Answer 2

I couldn't get the example to stop the stack out of space as there were to many calls on the stack to the DoMarquee method. Plus I thought a marquee wrote it out character by character. So using Application.OnTime event to create the marquee. I also took out the iWidth and made it a global variable.
Option Explicit
Private iWidth As Long
Private Declare PtrSafe Sub Sleep Lib "kernel32" (ByVal dwMilliseconds As Long)
Public Sub DoMarquee()
Dim sMarquee As String
Dim iPosition As Long
Dim rCell As Range
Dim iCurPos As Long
Dim txtMarquee As String
sMarquee = "This is a scrolling Marquee."
Set rCell = Sheet1.Range("M2")
'check to see if the cell is empty
If rCell.Value = "" Then
'set the current position to 0 and iWidth to 0
iCurPos = 0
iWidth = 0
Else
'not blank so writing has started. Get the position of the cell text
iCurPos = InStr(1, sMarquee, rCell.Value)
End If
If iCurPos = 0 Then
'it is zero so get the first character
rCell.Value = Mid(sMarquee, iCurPos + 1, 1)
Else
If iWidth < 10 Then
'width is less then ten so we have not written out the max characters,
'continue until width is 10
iWidth = iWidth + 1
rCell.Value = Mid(sMarquee, 1, iWidth)
Else
'maxed the amount to show so start scrolling
rCell.Value = Mid(sMarquee, iCurPos + 1, iWidth)
End If
End If
'release range object
Set rCell = Nothing
'Application.OnTime to stop the stack out of space
DoEvents
Sleep 100
Application.OnTime Now, "DoMarquee"
End Sub