VB .NET 2010 find out which control has focus

Vb .NET 2010

I have a inputpanel and i'd like to find out which control has current focus. Is there a way to do this ?
siacomAsked:
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larkvaleCommented:

The correct way is to handle the GotFocus event on the controls you are interested in ...
(You can also handle the LostFocus event if you want to know when something loses focus)


    Private Sub TextBox1_GotFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox1.GotFocus
        ' TextBox1 got the focus
        ' Enable / Disable your button as required
    End Sub

    Private Sub ComboBox1_GotFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles ComboBox1.GotFocus
        ' ComboBox1 got the focus
        ' Enable / Disable your button as required
    End Sub

    Private Sub CheckBox1_GotFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles CheckBox1.GotFocus
        ' CheckBox1 got the focus
        ' Enable / Disable your button as required
    End Sub

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Jini JoseSenior .Net DeveloperCommented:
can u please tell what you have to do ?
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siacomAuthor Commented:
1) Toggle a save button between enabled and disabled as soon as a object within the inputpanel is changed.

Cuurently I am using this to do so:

    Private Sub inputComponent_Changed(ByVal sender As System.Object, ByVal e As System.EventArgs) _
             Handles inputTxtCompany.BoundValueChanged, txtContactName.BoundValueChanged, _
                     InputComboBox1.SelectedIndexChanged, InputComboBox2.SelectedIndexChanged, _
                     InputComboBox3.SelectedIndexChanged, InputComboBox4.SelectedIndexChanged, _
                     InputTxtClientNo.BoundValueChanged, lblContactName.BoundValueChanged, _
                     chkBothIndustries.CheckedChanged, InputTxtIndustry.BoundValueChanged, _
                     InputComboBox5.SelectedIndexChanged

        MainForm.cmdSave.Enabled = True
....

2) Only a few controls need further processing depenging on the change, like combo boxes and chekboxes for example.

So I tried this:

        Dim ctrl As Control = ActiveControl

        Debug.Print(ctrl.Name)


on load and because the form is a mdichild of the mainform where the ribbon buttons are
an error occur on the main form

An error occurred creating the form. See Exception.InnerException for details.  The error is: Object reference not set to an instance of an object.

The Me statement on the main form triggers an error.

If I step over this the compiler completes sucessfully and the program will run. Problem is the method above return nothing.

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Jini JoseSenior .Net DeveloperCommented:
you may need to loop through the controls in the form and panel
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siacomAuthor Commented:
back to the first questrion )

how do I find out the activecontrol (current focus) ?

tried this ....
        For Each ctrl In Me.Controls
            what statement resolves current focus ?

        Next
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Jini JoseSenior .Net DeveloperCommented:
ctrl.Focus()
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siacomAuthor Commented:
i thought thats sets the focus not returns it ?
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John (Yiannis) ToutountzoglouInstructor Multiengine PilotCommented:
try something like this...
Dim control As Control
        For Each control In Me.Controls
            If control.Focused Then
                MsgBox("Focused Control: " & control.Name)
            End If
        Next

Open in new window

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PagodNaUtakCommented:
Try this code...

Dim control As Control  
        For Each control In Me.inputComponent.Controls  
            If control.Focused Then  
                MsgBox("Focused Control: " & control.Name)  
            End If  
        Next

Open in new window

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Wayne Taylor (webtubbs)Commented:
Use Me.ActiveControl to get the active control.

Wayne
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