run-time error 13 - type mismatch

Hi, pls what's wrong with the code below?

(PLS NOTE: optNumber is a radio button array, txtNumber is a text box)


Private Sub optNumber_Click(Index As Integer)
Dim OldNumber As String
Dim NewNumber As String

OldNumber = txtNumber.Text

NewBase = optNumber(Index).Tag 'problematic line

I keep getting the following error:

"run-time error 13 - type mismatch"

I'll be very grateful for any assistance offered

Where is NewBase declared? and what is it?

Option Explicit

'Variables to hold Old Base Type and New Base Type

Private OldBase As Integer
Private NewBase As Integer

Hi, thanks. NewBase is an integer and is made general in "Option Explicit"

Use the immediate window and see what is in optNumber(Index).Tag

The tag property must have something in it otherwise it will generate this error

VB Code:

If OptNumber(index).Tag = "" Then
    'do nothing
Else
        NewBase = OptNumber(index).Tag
End If

Quote:

---

Originally posted by BrianS
Use the immediate window and see what is in optNumber(Index).Tag

---

What immediate window?

Also thanks.. the runtime error 13 not longer appears but the calculator does not function properly - when i click one of 4 radio buttons (optNumber) it is meant to convert from one base to another eg binary to decimal etc

The coding for the actual conversion works ok. but essentially the whole problem lies in the section below:

Private Sub optNumber_Click(Index As Integer)
Dim OldNumber As String
Dim NewNumber As String

OldNumber = txtNumber.Text

If optNumber(Index).Tag = "" Then
'do nothing
Else
NewBase = optNumber(Index).Tag
End If

Select Case NewBase
Case 2
txtNumber.MaxLength = 50
Case 8
txtNumber.MaxLength = 17
Case 10
txtNumber.MaxLength = 15
Case 16
txtNumber.MaxLength = 13
End Select

'If Base Type was clicked but no numbers entered then
'change Old and New Base to the Type selected and exit
If OldNumber = "" Then
OldBase = NewBase
Exit Sub
End If

Works find for me, you sure you have the tag property set?

oh I think I know what you want

add

txtnumber = OldNumber after the select case

Like this?

End Select

txtNumber = OldNumber

'If Base Type was clicked but no numbers entered then
'change Old and New Base to the Type selected and exit
If OldNumber = "" Then
OldBase = NewBase
Exit Sub
End If

Also how do i set the tag property (if it isn't set already)?

Yea.... ummm are you possibly mistaking the tag property (which is a value not used by visual basic, it's only there for the user to put "notes", extra data like keys, etc in) with the .caption property (which is used to display the text that is beside the radio button)?

I'm not sure if that's the case because when i change .tag to .caption (as below) then I start getting the runtime error 13 again.

Like I'd said earlier, the same code snippet work worked as a 'standalone base convertor' however when I integrated it into my scientific calculator code it just refused to run despite the fact it's EXACTLY the same code.

Private Sub optNumber_Click(Index As Integer)
Dim OldNumber As String
Dim NewNumber As String

OldNumber = txtNumber.Text

'NewBase = optNumber(Index).Tag

If optNumber(Index).Caption = "" Then

'do nothing

Else

NewBase = optNumber(Index).Caption

End If

(note changing back from .Caption to .Tag causes the runtime error to disappear, however when the radio buttons (optNumber are clicked, nothing happens)

Heres my code, based on yours.
Note my radio buttons are called Option1 because I forgot to rename then when adding them to my form

Now I manually added in the tags to each of the option buttons in the form view.

VB Code:

Dim oldbase As Integer
Dim newbase As Integer
Private Sub Option1_Click(Index As Integer)
    Dim OldNumber As String
    Dim NewNumber As String
    
    OldNumber = txtnumber.Text
    If Option1(Index).Tag = "" Then
        'do nothing
    Else
        newbase = Option1(Index).Tag
    End If
    
    Select Case newbase
        Case 2
            txtnumber.MaxLength = 50
        Case 8
            txtnumber.MaxLength = 17
        Case 10
            txtnumber.MaxLength = 15
        Case 16
            txtnumber.MaxLength = 13
    End Select
    txtnumber = OldNumber
    'If Base Type was clicked but no numbers entered then
    'change Old and New Base to the Type selected and exit
    If OldNumber = "" Then
        oldbase = newbase
        Exit Sub
    End If
 
End Sub

ok. thanks very much. i think we are almost there. but how did u manually add in the tags for each of the option buttons in form view?

I entered the values you have in your select case into the tag properties on the form.

BINGO! Thanks very much! I just realized the same a couple hrs ago. You've been very helpful.

No problem dude