I do not execute any code to change the currentcontrol, I set it at design time to the TextBox2, and rely on the grid to use it on the active cell, just like the grid is supposeed to.

Also, I can tell it is the Textbox2, because I turned the borderstyle off on Textbox1, and ON for TextBox2. That way I can see that TextBox is indeed the one being used, but it still behaves as readonly.