Description
External_class_name is used to "wrap" a windows control inside of a DataFlex class. This is an advanced technique which requires knowledge of both the Windows API and the DataFlex method of "wrapping" classes. This used in conjunction with the external_message message.
Set External_Class_Name "DFTimer" to "static"
Set External_Class_Name 'DFTreeView' To 'SysTreeView32'