Using ActiveX Controls
The .NET Framework utilizes an object-oriented development style, while ActiveX components deliver encapsulated functionality through standard interfaces that communicate with the form on which they are placed. To make a legacy ActiveX control accessible as a .NET class, it is necessary to encapsulate the ActiveX control within a wrapper, which serves as a proxy between the .NET and ActiveX development technologies.
 | A wrapper is a software layer that acts as a control container for an ActiveX component. It allows .NET code to treat the contained component as a normal Windows Forms control. |
The Windows Forms ActiveX Control ...
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