In a Target A, I call another Target B. In B, I have a task which has an output value, how can I get this value from the caller Target A?Thanks.

<Target Name="B">
<Exec Command="some command" >
<Output TaskParameter="ReturnParam" ItemName="Value">
</Exec>

<Message Text = "@(Value)"></Message>
</Target>

<Target Name="A">

<CallTarget Targets="B"/>
<Message Text = "@(Value)"></Message>

</Target>