>>>If I am using a non-proportional font for a control does anyone have a calculation to determine the maximum value needed for Width?
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>>If you have AutoSize=.T., setting the new label will give you the width. You can then take action depending on the width.
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>I have AutoSize=.T. in my label base class. What I was after was determining the width for objects like textboxes, comboboxes, etc.

I see, you would like to size your textbox controls with an approximative width based on the maximum number of characters. There are a few builders that will allow you to do that. In your case, you will get the exact size as you are working in non proportional font. I think those builders are called autosize builders or something like that.