Hi Claudio.

>> Would exist some way which I can center a checkbox in a Grid? I only saw a manner to align to left or right, but what I need is it in center... <<

You may want to consider using graphical style CheckBoxes in your Grid. You can have different pictures to DownPicture(checked) and UpPicture(Not Checked). personally, I think they look way cooler in grids that the standard style ones.

Marcia