Select the DLL for which you want to define a procedure and expand it.
Select the Procedures submodule, right-click, and click 
(Object Below). A new procedure appears below the Procedures submodule.
Before an ATEasy module can call a DLL procedure, you must define the DLL procedure within the module.
To define a DLL procedure:
Select the DLL for which you want to define a procedure and expand it.
Select the Procedures submodule, right-click, and click (Object Below). A new procedure appears below the Procedures submodule.
You must now set the DLL procedure's properties as specified in the DLL vendor's documentation. For instructions on defining DLL procedure properties, return values, and parameters, see Setting DLL Procedure Properties.
ATEasy v5.0 and above allows you to import C programing language header file (.h) that contain the DLL functions and data types instead of defining it manually as described in this section. See Importing DLL Functions and Data Types from C Header files for more information.