How to check controls created at runtime in a windows form application?

[Amer Rehman 0]

Hi Here is the code that I've written. Private Function CheckControl(ByVal ctrlName As String) As Boolean             Dim ctrl As Control             Dim blnResult As Boolean             For Each ctrl In Me.Controls                   If ctrl.Name = ctrlName Then                         blnResult = True                   End If             Next             Return blnResult End Function The problem is that it does not give the correct answer i.e. even if the control exists, it returns false. Thanks

reman

[Mycroft Holmes]

Remember a control (panel, groupbox etc) can have a collection of controls, you are only checking the top level of controls on the form. You need to check if a control has controls and call the same procedure from within your foreach loop. Example

        For Each ctrl In Me.Controls
              If ctrl.Name = ctrlName Then
                    blnResult = True
              End If
              CheckControl(ctrl)
        Next

Never underestimate the power of human stupidity RAH

[Fernando Soto]

Hi Amer Rehman; If you are using .Net Framework 2.0 or higher you can use the Control.ControlCollection.Find Method to find a control. The second parameter states to search all child controls as well as shown in the code snippet below.

Private Function CheckControl(ByVal ctrlName As String) As Boolean

Dim blnResult As Boolean = False

If (Me.Controls.Find(ctrlName, True).Length > 0) Then
    blnResult = True
End If

Return blnResult

End Function

Fernando