Please anybody can help me that how i can add text to a text item at run time by clicking on button and the old text should not be cleared the new text should appear next to the old text on the same text item.
following is an easy example for you issue. Try..
IF :ASSIGN_ITEM IS NULL THEN
:ASSIGN_ITEM:='Your text here..';
:ASSIGN_ITEM:=:ASSIGN_ITEM||', Your text here..';
Hope this helps