How to count the number of text boxes that are data entered

Question

How to count the number of text boxes that are data entered in visual basic form.

Answer 1

Here is an Iterator that expands on my previous response:
''' <summary>
''' Iterator for form controls
''' </summary>
''' <param name="onlyControlsOfType">specify type if a certain type of controls needed</param>
''' <param name="onlyTopLevel">if true don't search containers within the form</param>
''' <returns></returns>
''' <remarks></remarks>
Private Iterator Function AllControls(Optional onlyControlsOfType As Type = Nothing, _
Optional onlyTopLevel As Boolean = False) As IEnumerable(Of Control)
Dim ctrl As Control = Me.GetNextControl(Me, True)
Do Until ctrl Is Nothing
If onlyControlsOfType Is Nothing OrElse ctrl.GetType = onlyControlsOfType Then
If TypeOf ctrl.Parent Is Form OrElse Not onlyTopLevel Then
Yield ctrl
End If
End If
ctrl = Me.GetNextControl(ctrl, True)
Loop
End Function
Some sample uses:
For Each
For Each c As Control In AllControls()
Debug.WriteLine(c.Name)
Next
List of all controls, including controls in containers i.e. Groupbox
Dim l As List(Of Control) = AllControls().ToList
List of all Textbox controls, including Textboxes in containers i.e. Groupbox
l = AllControls(GetType(TextBox)).ToList
List of all Textbox controls, don't include Textboxes in containers i.e. Groupbox
l = AllControls(GetType(TextBox), True).ToList
'Those who use Application.DoEvents() have no idea what it does and those who know what it does never use it.'  JohnWein
Multics
My Serial Port Answer