Hi Richard,

My question relates to lesson 3, expert 6, time index 09.00.

Could you please supply further clarification as to why the default value property has to be used instead of the control source property to attach a formula to the 'BeginDate' text box.

I don't understand the message supplied by Access 'Control can't be edited, it's bound to the expression'Date()-30'-can you explain what this means please.

Many thanks

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Reply from Richard Rost:

Default Value allows you to START with one value, but change it if needed. If you set a Control Source value, you're stuck with just that... and get a "control can't be edited" message.