设置IME(combox )
<ComboBox x:Name="cmBoxLine1" FontSize="36" DisplayMemberPath = "レーン*" Canvas.Left="509" Canvas.Top="359" Width="144" Height="51" IsEditable="True" LostKeyboardFocus="message_LostKeyboardFocus" KeyUp="message_KeyUp" >
<ComboBox.InputScope>
<InputScope>
<InputScope.Names>
<InputScopeName NameValue="Hiragana"/>
</InputScope.Names>
</InputScope>
</ComboBox.InputScope>
</ComboBox>