John,

>1. I need a grid like control, that allow user to user arrow up, down, left adn right to move from one

Ok, so use a grid. *s*

>2. I want the left most column control/grid to be readonly, and look like left most column of msflexgrid activeX control.

You can set the ReadOnly column property.

>3. I also hope this control allow user to edit the colour/size while stock in.

You can use DynamicBackColor to show colors.

>Or, do you know, how the POS system-fashion let user to do this thing??

You might check www.hallogram.com