レイヤー情報を取得

'pLayerがNothingの場合,intLayerからLayerオブジェクトを取得
'pLayerが存在する場合,pLayerからレイヤ インデックス番号を返す
Function FindLayerInfomation(ByVal pMap As IMap, ByRef pLayer As ILayer, ByRef intLayer As Integer)
    If pLayer Is Nothing Then
        '戻り値:pLayer
        pLayer = pMap.Layer(LayerIndex)
    Else
        For intLayer = 0 To pMap.LayerCount - 1
            If pLayer Is pMap.Layer(intLayer) Then
                '戻り値:現在のintIndex
                Exit For
            End If
        Next intLayer
    End If

End Function