java - SWT Window doesn't close on context menu click -

i using

shell shell = new shell(display,swt.none); 

this removes listener or disables close event. when try right click application in taskbar , "close window" doesn't anything. if use shell style such

swt.min

then performs close operation. using windows 7.

i need have borderless window , @ same time able close application context menu, if possible.

swt.no_trim 

does want. window without border still closes using taskbar context menu.