CONTROL.GetClass

hClass = CONTROL.GetClass( hControl AS HANDLE ) AS HANDLE

Returns the Class Handle for the specified CONTROL.  The Class handle can be used in xxx.Attach Extension Library function calls to attach to an existing control.  These handles are the same as MAXA$CONTROL_x.HANDLE environment variables.  Care should be taken to not modify any of these since that would lead to unpredictable results or application crash.