rts. The <i>count</i> argument should specify the number of IODisplayInfos in <i>modeList</i>. <i>isValid</i> should either be 0 (in which case it's ignored) or an array that corresponds to the <i>modeList</i>. If <i>isValid</i>[1] is NO, for example, then this method ignores the IODisplayInfo pointed to by <i>modeList</i>[1].</font>

<p><font face="Times">If this method finds a match, it returns the index of the matching IODisplayInfo in modeList. If the &quot;Display Mode&quot; key is missing or its value