ComboBox.MatchRequired Property (Outlook Forms Script)
Returns or sets a Boolean that specifies whether a value entered in the text portion of a ComboBox must match an entry in the existing list portion of the control. Read/write.
expression A variable that represents a ComboBox object.
The user can enter non-matching values, but may not leave the control until a matching value is entered.
True if the text entered must match an existing list entry. False if the text entered can be different from all existing list entries (default).
If the MatchRequired property is True, the user cannot exit the ComboBox until the text entered matches an entry in the existing list. MatchRequired maintains the integrity of the list by requiring the user to select an existing entry.
Not all containers enforce this property.
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