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IMultiItem.HelpFile Property (ArcObjects .NET 10.8 SDK)
ArcObjects Help for .NET developers > ArcObjects Help for .NET developers > ArcObjects namespaces > SystemUI > ESRI.ArcGIS.SystemUI > Interfaces > IM > IMultiItem Interface > IMultiItem.HelpFile Property
ArcGIS Developer Help

IMultiItem.HelpFile Property

The name of the help file associated with this multiItem.

[Visual Basic .NET]
Public ReadOnly Property HelpFile As String
public string HelpFile {get;}
HRESULT get_HelpFile(
  System.String* HelpFile
HelpFile [out, retval]

HelpFile is a parameter of type BSTR*

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.


The HelpFile property is used to specify the name of the help file that contains the context sensitive help topic for your custom MulitItem.

This assigns the same HelpFile to all of the items in the MulitItem. If you want each item to have a separate HelpFile then you should use the IMultiItemEx.ItemHelpFile property instead.


If you set both the HelpFile and HelpContextID properties, then an end-user of your multiItem can use the "What's This?" command in ArcMap or ArcCatalog to get help on your commands. Note, if you want your What's This help to look and behave the same as the standard ArcGIS commands, then you should create a WinHelp file instead of a HTMLHelp file.

If you have a WinHelp file (*.hlp), set IMultiItemHelpFile to the name of the help file containing the topic that describes the multiItem and set IMultiItem_HelpContextID to the topic ID's mapped numeric value. The topic ID is the so-called # footnote in the RTF file you include in your WinHelp file. You can use Help Workshop to add this numeric value by opening the HPJ file, clicking Map and then clicking Add (to add the mapping for an individual topic). See the help topic "To enable a program to display an individual Help topic" in the Help Workshop's help file.

If you have an HTMLHelp file (*.chm) the procedure is similar; specifiy the
.chm file as IMultiItem_HelpFile and the mapped numeric value as
IMultiItem_HelpContextID. Popup topics are problematic with HTMLHelp, but the help topic will display in a default or user-defined window.

As part of your deployment strategy register the name of the WinHelp file (*.hlp) as a new string value in:

Or if you're working with a HTMLHelp file (*.chm) register its name as a new string value in:

See Also

IMultiItem Interface