Introduction

Driver is available not only as a DLL but as ActiveX control as well. In addition to the set of functions available in SOPad.dll the ActiveX control provides other functionality such as automated real-time signature preview.

Interfaces

Registry Entries

Registry values in the following registry keys control aspects of the functionality of COM:

• HKEY_LOCAL_MACHINE\SOFTWARE\Classes

• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole

• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion

As of Windows Server 2003, COM uses only the current process token to decide which registry hive to access, not the thread token. If COM is not able to access the user profile registry hive, it will access the HKEY_LOCAL_MACHINE\System hive.

Related topics

• https://msdn.microsoft.com/de-de/library/ms694355(v=vs.85).aspx                       - registry entries
• http://www.techvanguards.com/stepbystep/comdelphi/client.asp                            - how to create com client
• http://digital.ni.com/public.nsf/allkb/4F811A9B23F1D46E862566F700615B7A       - how to register ActiveX controls , ActiveX server and type libraries