You can use the Text
property to set or return the text contained in a text box or in the text box portion of a combo box.
To set or return a control's Text
property, the control must have the focus, or an error occurs. To move the focus to a control, you can use the SetFocus method or GoToControl action.
You can use the Value
property to determine or specify if a control is selected, the selected value or option within the control, the text contained in a text box control, or the value of a custom property.
The Value
property returns or sets a control's default property, which is the property that is assumed when you don't explicitly specify a property name. In the following example, because the default value of the text box is the value of the Text property, you can refer to its Text property setting without explicitly specifying the name of the property.
Forms!frmCustomers!txtLastName = "Smith"
Text Property Reference
http://msdn.microsoft.com/en-us/library/aa173453.aspx
Value Property Reference
http://msdn.microsoft.com/en-us/library/aa173476.aspx