changing default value of Numeric box permanently

i want to change default value of my numeric control permanently when changed by the user , for example my numeric control is displaying 44.555 when my  user interface starts. As 44.555 is default value for the numeric control but if i change the value to 45.444 then i want the default value to be 45.444 so that when i load my user interface again then numeric control displays 45.444. in short i want to update the default value of my control when loaded.

i have already studied

http://zone.ni.com/reference/en-XX/help/370051V-01/cvi/uiref/cvinumeric_attributes/

http://zone.ni.com/reference/en-XX/help/370051AC-01/cvi/uiref/cvisetctrlattribute/