Echelon OpenLDV - Manual (Page 129)

OpenLDV Programmer’s Guide 121
}
STDMETHOD(SetOptions)(BSTR options)
{
return E_NOTIMPL;
}
// ILdvxLookup Methods
public:
STDMETHOD(DownlinkLookup)(ILdvxSCO * xSCO)
{
return E_NOTIMPL;
}
STDMETHOD(UplinkLookup)(ILdvxSCO * xSCO)
{
return E_NOTIMPL;
}
STDMETHOD(UpdateLookup)(ILdvxSCO * xSCO)
{
return E_NOTIMPL;
}
};
Add the Extension to the Component Category
To allow the OpenLDV xDriver Profile Wizard (and other xDriver-related tools)
to display your custom lookup extension, you must register the lookup extension
as belonging to the xDriver Lookup Component Category:
1. Add the following lines to your component’s header file (after
END_COM_MAP()in SampleLookupCsv.h):
// COM component category map
// (CATID_LdvxLookup is defined in LdvxTypes.h)
BEGIN_CATEGORY_MAP(CSampleLookupCsv)
IMPLEMENTED_CATEGORY(CATID_LdvxLookup)
END_CATEGORY_MAP()
2. Add the following line at the top of your component’s header file:
#include "LdvxTypes.h"
3. Add the directory that contains the LdvxTypes.h header file
(L ON W ORKS \OpenLDV SDK\Include) to your project’s include path
(select Project → ProjectName Properties to open the project’s
properties dialog, expand Configuration Properties, expand C/C++,
select General, then add the path to the Additional Include
Directories field).
Build and Register the COM Server
Select Build → Build SampleLookup to build the SampleLookup part of the
solution.
Note: For Windows operating systems that include User Account Control
(Windows 7 or Windows Vista), if you do not run Visual Studio with elevated
permissions (for example, as an Administrator), you will likely see the following
error message during registration: