How to set a value in XTable When Click a Button?

[SmallFox]

Hello,EveryOne

I only can initial control use EventValGet,But I Can't set a value or change a value when i click a button (or other event occured)

[kikigyq]

Specifies in a user dialog box the value of the term selected in a selection list of an extended table. The range of values corresponds to the number of options in the control. If no element is selected, the property has the value -1.

Object	ListBox <XTable> Object with this property
Object.Value	LongInteger with read and write access

you can refer to http://zone.ni.com/reference/en-XX/help/370858P-01/sudref/properties/sud_property_value_tolistboxrt_...