Enable checkboxes based on textbox value

[poops2468]

I have a form with a lot of text boxes and an equal number of check boxes. I want the check box to be disabled if the text in the text box is a certain value. I'm still a VB noob, so forgive me if my question is too trivial.


Obviously this doesn't work, otherwise I wouldn't be asking, but by looking at this you should be able to see what I am trying to do. Does anyone have a solution or suggestion?

        Dim x
        Dim y As New Control
        Dim z As New Control

        For x = 1 To 40
            y = "txtTextBox" & x
            z = "chkcheckBox" & x
            If y.Text = "3" Then
                z.Enabled = False
            End If
        Next

The error is....
Unable to cast object of type 'System.String' to type System.Windows. Forms.Control'.

Now I know I can't refer to a control using the string combination, but thats all I could think of to get through all of my controls in a for..next.


Thanks

[Killer42]

I'm not familiar with VB.Net since I use the older VB6, but I can suggest something to try..

        Dim x
        Dim y As New Control
        Dim z As New Control

        For x = 1 To 40
            ' [I]y = "txtTextBox" & x[/I]
            [B]Set y = Me.Controls("txtTextBox" & Format(x))[/B]
            ' [I]z = "chkcheckBox" & x[/I]
            [B]Set z = Me.Controls("chkcheckBox" & Format(x))[/B]
            If y.Text = "3" Then
                z.Enabled = False
            End If
        Next

Note that I'm using the Format() function to strip off the extra space that you get when appending a number to a string. This applies in VB6, but may not in your version. Feel free to experiment. :)