AnimateWindow() calls SetWindowPos() on a timer???

[Bobby Bingham]

I am implementing AnimateWindow(), and I recorded all the messages win98 sent 
to my window when I called AnimateWindow().  It send a lot of groups of 
WM_WINDOWPOSCHANGING, WM_NCCALCSIZE, and WM_WINDOWPOSCHANGED.  The number of 
times it sends these seems to correspond to how long I tell it to make the 
animation, almost as if it were on a timer.  It looks like it calls 
SetWindowPos() on the window a lot, but I don't see why they would do this.  
Does anyone know??  I can supply my test app once I clean it up a little.

Bobby Bingham
uhmmmm(a)ameritech.net