ComboBox.TopIndex Property (Outlook Forms Script)
Returns or sets a Long that represents the index of the item displayed in the topmost position in the list portion of the ComboBox. Read/write.
Syntax
expression.TopIndex
expression A variable that represents a ComboBox object.
Remarks
The default is 0, which identifies the first item in the list.
Returns the value -1 if the list is empty or not displayed.
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