Prompt values need to be display in text box

Hi

I am new to design studio. I am trying to display the prompt vales in text box. which ever we selected values in prompt that need to be displayed in the text box . I am using script

APPLICATION.openPromptDialog(400, 400);

DS_1.loadDataSource();

TEXT_34.setText(DS_1.getVariableValueExt(.........));

please help me to fix the issue.

Thanks,

Regards,

Sudarsan