WPF单选按钮不正确地显示鼠标悬停的颜色

我在工具栏中有三个单选按钮作为选项卡的一部分。打开选项卡时，第一个按钮始终显示鼠标悬停的颜色-当用户单击选项卡上的任何位置时，该按钮消失，下次选择选项卡时再次返回。我试着将焦点放在其他元素上，似乎没有任何东西能阻止这种行为，这对用户来说非常混乱——在下面的屏幕截图中，选择了“语句”

---

结果表明，对于所有单选按钮，setting.Focusable=False就是答案：-）

Dim NotUsedRB As New RadioButton
        With NotUsedRB
            .Content = "Not Used"
            .ToolTip = "This mailing address is not used"
            .GroupName = "MailingRB"
            .Name = "Mailing_NotUsedRB"
        End With
        RegisterControl(Customer_Grid, NotUsedRB)
        vToolbar.Items.Add(NotUsedRB)
        vToolbar.Items.Add(TS_Separator)

        Dim StatementsRB As New RadioButton
        With StatementsRB
            .Content = "Statements"
            .ToolTip = "Mailing address used for statements"
            .GroupName = "MailingRB"
            .Name = "Mailing_StatementsRB"
        End With
        RegisterControl(Customer_Grid, StatementsRB)
        vToolbar.Items.Add(StatementsRB)
        vToolbar.Items.Add(TS_Separator)

        Dim FinesRB As New RadioButton
        With FinesRB
            .Content = "Fines"
            .ToolTip = "Mailing address for violation fines"
            .GroupName = "MailingRB"
            .Name = "Mailing_FinesRB"
        End With
        RegisterControl(Customer_Grid, FinesRB)
        vToolbar.Items.Add(FinesRB)
        vToolbar.Items.Add(TS_Separator)