ComboBox.AutoSize Property (Outlook Forms Script)
Returns or sets a Boolean that specifies whether an object automatically resizes to display its entire contents. Read/write.
expression A variable that represents a ComboBox object.
True to automatically resize the control to display its entire contents. False to keep the size of the control constant; contents are clipped when they exceed the area of the control (default).
For controls without captions, this property specifies whether the control automatically adjusts to display the information stored in the control. In a ComboBox, for example, setting AutoSize to True automatically sets the width of the display area to match the length of the current text.
If you manually change the size of a control while AutoSize is True, the manual change overrides the size previously set by AutoSize.