You specify the response to termination response definition within a block if you want an action to occur whenever that block is left implicitly.

 

In the following example, the user has two objects on the screen: Name and Number. If the user first selects Name and then selects Number (which causes the program to implicitly leave the block in the response to Name statement), response to termination will clean up the screen by making TypeName invisible.

 

enabled graphical region Name size 50 20

    at position 0 100 border

 

invisible disabled key TypeName at position 10 10 in Name

    ...

 

enabled graphical region Number size 50 20

    at position 100 100 border

 

response to Name

    make TypeName visible

    begin

        response to char "\n" from keyboard

            leave block

        response to char from keyboard

            add to TypeName

                text input

        response to termination

            make TypeName invisible

    end

 

response to Number

    ...

 

The response to termination response definition cannot contain a block, nor can it contain a reference to any action routine which contains a block. If it does, an irrecoverable runtime error may occur, and no error message will be generated.