How to enter key board cursor move to other textbox in VB.NET

Be careful: what you describe is expected behavior, so modification of this behavior can make some confusions.

Text box cursor is shown according to current keyboard focus. At the same time, it may make sense. To detect Enter, handle the event KeyDown on each control you need to pass keyboard focus. The event handler should focus the next control using Control.Focus.

I do not provide exact MSDN links and fully qualified type names because you not tag the UI library you want to use. My advice works for WPF Control and System.Windows.Form.Control and TextBox, but the name spaces are different.

You should prefer the following schema: create one single event handler of all such control and the table of focus transitions. You can find out which control got the key Enter from the parameter object sender, passed to the event handler. The transition table should define next control from the currently focused control.

—SA

use this on textBox Keypress Event
here txtUID and txtPassword are two textBoxes .here it is checking if txtUID is not blank or say if it is Filled and then Pressing Enter the Focus Will move to txtPassword

Private Sub txtUID_KeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtUID.KeyPress
            If Asc(e.KeyChar) = Keys.Enter Then
                If txtUID.Text.Trim() <> "" Then
                    txtPassword.Focus()
                End If
            End If
        End Sub

Implement this as Per your need.