Control Events

Most Microsoft Forms 2.0 controls in an Microsoft Outlook custom form support only one event, the Click event. A control bound to a field does not fire the Click event. You must handle the appropriate field event to detect a user's interaction with a control bound to a field. The following Forms 2.0 controls and Outlook controls fire the Click event whenever a user clicks anywhere in the control.
CheckBox
CommandButton
Frame
Image
Label
OptionButton
ToggleButton
OlkBusinessCardControl
OlkCategory
OlkCheckBox
OlkCommandButton
OlkContactPhoto
OlkDateControl
OlkFrameHeader
OlkInfoBar
OlkLabel
OlkOptionButton
OlkSenderPhoto
OlkTextBox
OlkTimeControl
OlkTimeZoneControl

The following controls fire the Click event when the user selects an item in the list.
ComboBox
ListBox
OlkComboBox
OlkListBox

The following controls do not support the Click event.
ScrollBar
SpinButton
TabStrip
TextBox

While the MultiPage control itself does not support the Click event, an individual Page on a MultiPage control will fire the Click event if the user clicks inside the client area of the page, but not if the user clicks the tab associated with the page.

To detect a change in a TextBox control, bind the control to a field and then handle the appropriate field event. If you have to further extend controls in a custom form, customize a form with Outlook controls in a form region instead of Forms 2.0 controls in a form page. For more information, see Controls in a Custom Form.