private void button1_Click(object sender, EventArgs e)
{
    int startSheetIndexl = 0;
    int endSheetIndex = fpSpread1.Sheets.Count - 1;
    string searchString = "Search";
    bool caseSensitive = false;
    bool exactMatch = false;
    bool alternateSearch = false;
    bool useWildcards = false;
    int startRowIndex = 0;
    int startColumnIndex = 0;

    fpSpread1.SearchWithDialogAdvanced(
        startSheetIndexl,
        endSheetIndex,
        searchString,
        caseSensitive,
        exactMatch, 
        alternateSearch,
        useWildcards,
        startRowIndex,
        startColumnIndex
        );
}