This is a well known problem. Basically you can not do anything to ensure the mousemove event is fired. Try using a timer to turn off the color bitmaps. You can use this technique along with the sys(1270) function to determine if the mouse is over your object or not.

>Just to give a good effect to the toolbar .
>
>i have made a class which acts the same as microsoft internet explorer 4 toolbar buttons.
>
>The problem exist that sometime mousemove works and sometime not resulting into activated color pictures on the toolbar.
>
>Any feedback welcomed.
>Thanks