Is there is any event fires when focus chenaged from one control to another control?

Just Handle LostFocus Event All Control Using One Function (or Sub) as Displayed Below

Private Sub LostFocus(ByVal sender as System.Object, e As EventArgs) Handles _
Control1.LostFocus, Control2.LostFocus, Control3.LostFocus, Control4.LostFocus, _
Control5.LostFocus, Control6.LostFocus, Control7.LostFocus, Control8.LostFocus, _
Control9.LostFocus, Control10.LostFocus

'Now Use sender Parameter to Identify Which Control Lost it's Focus
Select Case sender.Name
case Control1.Name
    ' Write Code
case Control2.Name
    ' Write Code
case Control3.Name
    ' Write Code
case Control4.Name
    ' Write Code
case Control5.Name
    ' Write Code
case Control6.Name
    ' Write Code
case Control7.Name
    ' Write Code
case Control8.Name
    ' Write Code
case Control9.Name
    ' Write Code
case Control10.Name
    ' Write Code
case Else
    ' Write Code Here if Necessary

End Select

End Sub

For Each ctrl As Control In Me.Controls
AddHandler ctrl.Enter, AddressOf ControlFocusChanged
Next


i write my code in controlfocuschanged event.


Thanks for your suggestions.

Depending on the type of control that is GAINING or LOSING control there are many events within the event cycles.

One place you can read more is here
http://www.thevbprogrammer.com/VBNET_08/08-00_VB2K_ControlBasics.htm[^]



Another place is here...
http://msdn.microsoft.com/en-us/library/system.windows.forms.containercontrol.activecontrol(v=vs.90).aspx[^]



The second example is much better as it uses the ACTIVECONTROL method to return the currently active control.

Taking a step back an looking at the larger picture allows us modify the sample in the second link...

such as for example...

Public Class Form1

    Private mPreviousControl As Control = Nothing
    Private mActiveControl As Control = Nothing

    Public Sub MyActiveControl(sender As System.Object, e As System.EventArgs)
        If (sender Is Nothing) = False Then
            mPreviousControl = mActiveControl
            mActiveControl = sender
            ListBox1.Items.Add("Active control is: " & mActiveControl.Name & Chr(13) & "Previous control was: " & mPreviousControl.Name)
        End If
    End Sub

    Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
        MyActiveControl(sender, e)
    End Sub

    Private Sub Button1_GotFocus(sender As System.Object, e As System.EventArgs) Handles Button1.GotFocus
        MyActiveControl(sender, e)
    End Sub

    Private Sub CheckBox1_GotFocus(sender As System.Object, e As System.EventArgs) Handles CheckBox1.GotFocus
        MyActiveControl(sender, e)
    End Sub

    Private Sub ComboBox1_GotFocus(sender As System.Object, e As System.EventArgs) Handles ComboBox1.GotFocus
        MyActiveControl(sender, e)
    End Sub

    Private Sub ListBox1_GotFocus(sender As System.Object, e As System.EventArgs) Handles ListBox1.GotFocus
        MyActiveControl(sender, e)
    End Sub

    Private Sub Label1_GotFocus(sender As System.Object, e As System.EventArgs) Handles Label1.GotFocus
        MyActiveControl(sender, e)
    End Sub

    Private Sub RadioButton1_GotFocus(sender As System.Object, e As System.EventArgs) Handles RadioButton1.GotFocus
        MyActiveControl(sender, e)
    End Sub

    Private Sub TextBox1_GotFocus(sender As System.Object, e As System.EventArgs) Handles TextBox1.GotFocus
        MyActiveControl(sender, e)
    End Sub

    Private Sub PictureBox1_GotFocus(sender As System.Object, e As System.EventArgs) Handles PictureBox1.GotFocus
        MyActiveControl(sender, e)
    End Sub

End Class

Using the sample above you can simply drop one each of the following controls
Button
Checkbox
Listbox
Combobox
Label
Radiobutton
Textbox
Picturebox

and then as you tab through the controls on the form the information is added to the listbox to show you which control is CURRENTLY active and which control was PREVIOSULY active.

The downside to this is off course that you MUST call the MyActiveSub procedure Immediately in your controls so that its gaining focus can be catalogued.

Ideally though, you really should process the event actions within the procedure for the relevant control as that is the preferred text-book method and standard procedure, after all, thats why the methods exist!


Additionally
Off course you dont need ANY of the above and can simply interogate the the Forms ACTIVECONTROL property to findout which control on the form is currently active such as....

dim some_variable as string
dim some_control as control

some_variable = me.activecontrol.name
some_control = me.activecontrol

you can do this with set tab order.
go to /view/tab order in visual studio and set tab order

or see the link to guide http://www.devasp.net/net/articles/display/831.html[^]

Hope will solve your problem...