GetUserData
GetUserData (winName, objID, userdataName)
The GetUserData function returns a string containing the user data for a window, subwindow, graph trace or control. The return string will be empty if no user data exists.
You set user data on a window or subwindow using the userData keyword of the SetWindow operation. You set it on a graph trace using the userData keyword of the ModifyGraph operation. You set it on a control using the userData keyword of the various control operations.
Parameters
winName may specify a window or subwindow name. Use "" for the top window.
When identifying a subwindow with winName, see Subwindow Syntax for details on forming the window hierarchy.
objID is a string specifying the name of a control or graph trace. Use "" for a window or subwindow.
userdataName is the name of the user data or "" for the default unnamed user data.