Returns a point whose x coordinate is the horizontal
dots per inch of the display, and whose y coordinate
is the vertical dots per inch of the display.
@return the horizontal and vertical DPI
@exception SWTException <ul>
<li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
</ul>
Returns a point whose x coordinate is the horizontal dots per inch of the display, and whose y coordinate is the vertical dots per inch of the display.
@return the horizontal and vertical DPI
@exception SWTException <ul> <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> </ul>