>>If it doesn't work, what does it do? Whether you're inserting or
>>overwriting, the first keypress (character, backspace or delete) will
>>have the same effect as if it were selected, won't it?
>>
>
>When the contents of the text box is only one character and I tab to the field, even though the format=K is set the single character isn't selected, the cursor is to the left of the character.
>
>Jeff

I just tested and 'K' works perfectly. Probably, it's something wrong with properties setting. Could you set InputMask="x" (it can be helpful). Also, it's always good 'troubleshooting' habit to delete textbox and create new one.