How can I get the mouse events to fire on a text box of a grid?

I have a grid with a single text box where I want the mouseenter or mousemove, and the mouseexit events to fire as move the mouse between rows. In summary: I want to change the icon based on a custom action for the value if the text box.

I polulated the methods in the column's text box. These method only seem to fire when I initially move into or out of the grid, or into or out of the selected row in the grid.

Thanks,
Troy