a middle button so a portable application should avoid relying on the events
from it.
-{\bf NB: } Note that under Windows mouse enter and leave events are not natively supported
+{\bf NB:} Note that under Windows mouse enter and leave events are not natively supported
by the system but are generated by wxWindows itself. This has several
drawbacks: the LEAVE\_WINDOW event might be received some time after the mouse
left the window and the state variables for it may have changed during this
time.
-{\bf NB: } Note the difference between methods like
-\helpref{LeftDown}{wxmouseeventleftdown} and
-\helpref{LeftIsDown}{wxmouseeventleftisdown}: the formet returns {\tt TRUE}
+{\bf NB:} Note the difference between methods like
+\helpref{LeftDown}{wxmouseeventleftdown} and
+\helpref{LeftIsDown}{wxmouseeventleftisdown}: the format returns {\tt TRUE}
when the event corresponds to the left mouse button click while the latter
returns {\tt TRUE} if the left mouse button is currently being pressed. For
-example, when the user is dragging the mouse you can use
+example, when the user is dragging the mouse you can use
\helpref{LeftIsDown}{wxmouseeventleftisdown} to test
whether the left mouse button is (still) depressed. Also, by convention, if
-\helpref{LeftDown}{wxmouseeventleftdown} returns {\tt TRUE},
+\helpref{LeftDown}{wxmouseeventleftdown} returns {\tt TRUE},
\helpref{LeftIsDown}{wxmouseeventleftisdown} will also return {\tt TRUE} in
wxWindows whatever the underlying GUI behaviour is (which is
platform-dependent). The same applies, of course, to other mouse buttons as