>>>1. The initial display of the grid doesn't show the InputMask, only after I click on the grid.
>>>
>>>2. The highlight doesn't properly work for this column. (I use HiglightStyle = 2)
>>
>>Works fine for me, I suspect you have changed some value which disables the default behavior.
>
>I have column's sparse set to .f. and I actually use my grid (subclass of the base grid class).

I tried to change the sparse property, got the same result. How do you populate the grid? I mean, do you set each column in the property sheet, or in code?