If I remember, window move and resize return those events only when you stop the resizing movement (ie mouse comes to a rest) or you let go of the button.
I've always known this to be standard behaviour on Windows systems going all the way back to Win 3.1 so is it really a problem to be solved?
In fact, just positioning the mouse cursor over the minimize or close button will cause the app to freeze for a second as the balloon tip pops up.
Sorry, but I'm getting different results here, for all the three situations. Regardless whether I use a window messages spy app or I write a MaxGUI app dumping out events, I always receive window move messages/events, also if the mouse doesn't come to rest.I couldn't find any windows application, which doesn't repaint the window's contents while dragging (except some BlitzMax and BlitzBasic applications).
And on my windows, the tool tip also comes up, without causing any applications to freeze. The only situation where I can confirm the freezing is when you click on the window's title bar and hold down the mouse button for a while, but don't move the mouse in this tme.
I could test only on one machine, WinXP Home with Sp2, but I supposed this was the default for all windows systems.
Personally I would avoid to make the window borderless and unmovable, since it's not that user friendly.
p.s.: doesn't the code above solve the problem?