Get content Focus on WPF DataGrid - wpf

Question

so im really not good at this xaml thing and i tried to look everywhere but couldn't find anything usefull for me, hopefully someone will be able to help me here.
So i have a datagrid with TemplateColumns where i have some controls in it such TextBox's and ComboBox's. What im trying to accomplish here is when i tab from one control i would like to focus on the next control in the same row but what is happening now is the column gets focus and only after that when i press tab again the control will be focus, in less words i have to tab twice to jump from one control to another. My datagrid looks like this:
<DataGridTemplateColumn Header="Omschrijving" Width="150">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Grid>
<TextBox TabIndex="0" Name="txtOms" Text="{Binding txtOmschrijving}" Width="140" Height="24" />
</Grid>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>

Answer 1

Since no one could give a hint or help i kinda digged down on the internetzz and found a solution, hopefully will help someone else in need:
Private Sub dgKasStaatRegels_Loaded(sender As Object, e As System.Windows.RoutedEventArgs) Handles dgKasStaatRegels.Loaded
Try
Dim CellFocusedChangedHandler As New RoutedEventHandler(AddressOf FocusChangedHandler)
[AddHandler](DataGridCell.GotKeyboardFocusEvent, CellFocusedChangedHandler)
Catch ex As Exception
WriteErrorLog("ucKasStaat", "dgKasStaatRegels_Loaded", ex)
End Try
End Sub
Private Sub FocusChangedHandler(sender As Object, args As RoutedEventArgs)
If args.RoutedEvent.RoutingStrategy = RoutingStrategy.Bubble Then
Dim DataGridCellObj As FrameworkElement = TryCast(args.OriginalSource, FrameworkElement)
If Keyboard.IsKeyDown(Key.Tab) Then
If DataGridCellObj IsNot Nothing Then
Dim txtb As TextBox = TryCast(DataGridCellObj, TextBox)
If txtb IsNot Nothing Then txtb.Focus()
Dim cb As ComboBox = TryCast(DataGridCellObj, ComboBox)
If cb IsNot Nothing Then
cb.Focus()
cb.IsDropDownOpen = True
End If
End If
End If
End If
End Sub
Public Shared Function FindParent(Of T As DependencyObject)(dependencyObject As DependencyObject) As T
Dim parent = VisualTreeHelper.GetParent(dependencyObject)
If parent Is Nothing Then
Return Nothing
End If
Dim parentT = TryCast(parent, T)
Return If(parentT, FindParent(Of T)(parent))
End Function
Quick explanation: on the datagrid load add a CellFocusedChangedHandler handler and in that sub just track if the object inside that row is a Textbox(in my case) and set its focus!
It worked for me!