/// <summary>
/// Maps one of the COMMAND_* constants to the HTML 1.0 Help equivalent.
/// </summary>
private static int MapCommandToHTMLCommand(HelpNavigator command, string param, out object htmlParam)
{
htmlParam = param;
if ((string.IsNullOrEmpty(param)) &&
(command == HelpNavigator.AssociateIndex || command == HelpNavigator.KeywordIndex))
{
return(HH_DISPLAY_INDEX);
}
switch (command)
{
case HelpNavigator.Topic:
return(HH_DISPLAY_TOPIC);
case HelpNavigator.TableOfContents:
return(HH_DISPLAY_TOC);
case HelpNavigator.Index:
return(HH_DISPLAY_INDEX);
case HelpNavigator.Find:
{
NativeMethods.HH_FTS_QUERY ftsQuery = new NativeMethods.HH_FTS_QUERY
{
pszSearchQuery = param
};
htmlParam = ftsQuery;
return(HH_DISPLAY_SEARCH);
}
case HelpNavigator.TopicId:
{
try
{
htmlParam = int.Parse(param, CultureInfo.InvariantCulture);
return(HH_HELP_CONTEXT);
}
catch
{
// default to just showing the index
return(HH_DISPLAY_INDEX);
}
}
case HelpNavigator.KeywordIndex:
case HelpNavigator.AssociateIndex:
{
NativeMethods.HH_AKLINK alink = new NativeMethods.HH_AKLINK
{
pszKeywords = param,
fIndexOnFail = true,
fReserved = false
};
htmlParam = alink;
return((command == HelpNavigator.KeywordIndex) ? HH_KEYWORD_LOOKUP : HH_ALINK_LOOKUP);
}
default:
return((int)command);
}
}
public static extern int HtmlHelp(HandleRef hwndCaller, [MarshalAs(UnmanagedType.LPTStr)] string pszFile, int uCommand, [MarshalAs(UnmanagedType.LPStruct)] NativeMethods.HH_AKLINK dwData);