Thanks for your responses guys. I first used an active x text box but I was having all kinds of problems with it, such as the speed of data entry was very slow, like having to wait at least a second until what you typed on the keyboard appeared, whenever I deleted all the contents, sometimes these grey boxes appeared inside the ends of the text boxes and if you clicked in the text box, they would disappear, only to reappear when I finished typing and when I did, you couldn't read what was behind them.
I think it was going really slow due to the code I already had that inserted please type notes here, when the box was empty and removed, in the change event for the box. This meant that every time a letter was typed, it would need to evaluate the code but I couldn't just have it in the got and lost focus events as I also needed the width of the box to stay at a fixed length.
I thought I would try a regular text box to see if I could avoid the problems, but it looks like the functionality of a regular box is not enough.