public string Remove(string Name, string Channel, int hour, int minute)
{
var db = SchumixBase.DManager.QueryFirstRow("SELECT 1 FROM calendar WHERE Name = '{0}' AND Channel = '{1}' AND Hour = '{2}' AND Minute = '{3}' And ServerName = '{4}'", sUtilities.SqlEscape(Name.ToLower()), sUtilities.SqlEscape(Channel.ToLower()), hour, minute, _servername);
if(db.IsNull())
return sLManager.GetWarningText("Calendar3", Channel, _servername);
SchumixBase.DManager.Delete("calendar", string.Format("Name = '{0}' AND Channel = '{1}' AND Hour = '{2}' AND Minute = '{3}' And ServerName = '{4}'", sUtilities.SqlEscape(Name.ToLower()), sUtilities.SqlEscape(Channel.ToLower()), hour, minute, _servername));
return sLManager.GetWarningText("Calendar4", Channel, _servername);
}