ppt vba multiple slide selection macro error - vba

Question

When multiple PowerPoint slide numbers are entered in the input box (ex: 3, 5, 6), I want to create a macro that selects the slides of the entered number, but an error occurs.
Sub test()
Dim strresponse2 As String
Dim iresponse2 As String
strresponse2 = InputBox("page number" & vbCr & "ex) 2,4,11,5")
If IsNumeric(strresponse2) Then
iresponse2 = strresponse2
End If
ActiveWindow.Selection.Unselect
ActivePresentation.slides.Range(Array(iresponse2)).Select
'error here
'How to fix it so it doesn't get an error
'ActivePresentation.Slides.Range(Array(2, 4, 11,5)).Select
'no error
End Sub

Answer 1

Several issues here.
a) If you enter 2, 4, 5, the check for IsNumeric(strresponse2) will fail because the function tries to convert the whole string into one single number.
b) Array(iresponse2) will not convert the string into an array (of 3 numbers). It will convert the single string 2, 4, 5 into an string array with 1 (not 3) member.
In your case, you can use the Split-function to split the input string into an array of strings.
c) If you want to access the slides by number, the input needs to be of a numeric type, not of string (even if the strings contain numbers). You will need to convert the string array into a numeric array (if you pass a string or an array of strings as parameter, VBA will look for members with the name, not the index).
Have a look to the following piece of code and check if it does what you need - it's only half tested (as I have no Powerpoint VBA available, only Excel, but the priniple is the same)
Dim answer As String
answer = InputBox("page number" & vbCr & "ex) 2,4,11,5")
Dim pagesS() As String
pagesS = Split(answer, ",") ' Split the answer into an array of strings.
ReDim pagesN(0 To UBound(pagesS)) As Long ' Create an empty numeric array
Dim countS As Long, countN As Long
For countS = 0 To UBound(pagesS) ' Loop over all strings
If IsNumeric(pagesS(countS)) Then ' String is Numeric
Dim pageNo As Long
pageNo = Val(pagesS(countS)) ' Convert string to number
If pageNo > 0 And pageNo <= ActivePresentation.slides.Count Then
pagesN(countN) = pageNo ' When number is within valid range, copy it
countN = countN + 1 ' Count the number of valid page numbers
End If
End If
Next countS
If countN > 0 Then ' At least one number found
ReDim Preserve pagesN(0 To countN - 1) ' Get rid of unused elements
ActivePresentation.Slides.Range(pagesN).Select
End If