HH_GET_LAST_ERROR command

Returns information about the last error that occurred in the HTML Help ActiveX control (Hhctrl.ocx).

Example

USES_CONVERSIONS; // For Unicode to ANSI string conversion



HH_LAST_ERROR lasterror ;



HWND hwnd = HtmlHelp(

                     hOwner, 

                     NULL, 

                     HH_GET_LAST_ERROR,

                     reinterpret_cast<DWORD>(&lasterror)) ;



// Make sure that HH_GET_LAST_ERROR succeeded.

if (hwnd != 0)

{

	// Only report an error if we found one:

	if (FAILED(lasterror.hr))

	{

		// Is there a text message to display...

		if (lasterror.description)

		{

			// Convert the String to ANSI

			TCHAR* pDesc = OLE2T(lasterror.description) ;

			::SysFreeString(lasterror.description) ;



			// Display

			MessageBox(hOwner, pDesc, 

                       "Help Error", MB_OK) ;

		}

	}

}

Return value

• On failure, zero.
• On success, non zero.

Comments

• There is no user interface (UI) associated with this command. The caller is responsible for returning error codes and text to a UI, such as a message box or a text file, and/or responding to an error.
• This command reports on a limited range of possible errors. If a call to HtmlHelp() returns NULL, HH_GET_LAST_ERROR may not always report an error.

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