string 
            loginEmail = "Spread@reasonables.com";
        
            string 
            APIKey = "TEST0000-TEST-0000-TEST-0000TEST0000";
            // suggest dateTime string format "yyyy-MM-ddTHH:mm:ss" ,such as "2023-02-06T12:11:21" .
            DateTime startTime = DateTime.Parse("2023-02-06T12:11:21");
            DateTime endTime = DateTime.Parse("2023-02-07T12:11:21");
             
        
            SpreadAPI.SpreadWebService MySpread =
            new SpreadAPI.SpreadWebService();
        
            DataSet 
            result = MySpread.GetUserSentReport(loginEmail, APIKey , SpreadAPI.AccountType.Email , startDate , endDate);
                     
                    
                        
            Dim 
            loginEmail As String 
            = "Spread@reasonables.com"
        
            Dim 
            APIKey As String 
            = "TEST0000-TEST-0000-TEST-0000TEST0000"
    
            ' suggest dateTime string format "yyyy-MM-ddTHH:mm:ss" ,such as "2023-02-06T12:11:21" .
            Dim startTime As DateTime = "2023-02-06T12:11:21"
            Dim endTime As DateTime = "2023-02-07T12:11:21"
             
        
            Dim 
            MySpread As New 
            SpreadAPI.SpreadWebService
        
            Dim 
            result As DataSet 
            = MySpread.GetUserCredit(loginEmail, APIKey, SpreadAPI.AccountType.Email)
                     
                    
                        
    /**
    * @name     GetUserSentReport
    * @function get user sent report
    * @param
    *  accountType	the type of account.
    *  startDate         Start time.
    *  endDate           End time.
    * @return
    *          dataset.
    */
    public function GetUserSentReport($loginEmail,$APIKey,$accountType,$startDate,$endDate){
        $array = array(
	        'loginEmail'        => $loginEmail,
	        'APIKey'	    => $APIKey,
	        'accountType'       => $accountType,
                'startDate'         => $startDate,
		'endDate'     	    => $endDate
        );
        $Client=new SoapClient("http://service.rspread.com/Service.asmx?WSDL");
        return $Client -> GetUserSentReport( $array );
    }
         
                     
                    No sample.