my application looks like http://www.treetops.com.sg/before.jpg when I fill an IC in patient IC textbox and click search button, it's supposed to query database and show what found in the right hand side listview. Everything seems ok by using mouse click, however if I want to use keyboard 'Enter' instead of mouse click what happen is all controls in this 'Patient Infomation' tab dispear: http://www.treetops.com.sg/after.jpg I have to manually switch to other tab then switch back, controls in Patient Infomation will appear. Anybody encountered this kind of problem before?