public MessageIndexCollection Search(
	bool returnUids,
	string searchCondition,
	string charset
)

Public Function Search ( 
	returnUids As Boolean,
	searchCondition As String,
	charset As String
) As MessageIndexCollection

using System;
using MailBee;
using MailBee.ImapMail;

class Sample
{
    static void Main(string[] args)
    {
        Imap imp = new Imap();

        // In the log, you can find the actual search queries sent to the server.
        imp.Log.Filename = "C:\\Temp\\log.txt";
        imp.Log.Enabled = true;
        imp.Log.Clear();

        imp.Connect("imap.company.com");
        imp.Login("jdoe@company.com", "secret");

        // Select Inbox folder.
        imp.SelectFolder("INBOX");

        UidCollection uids = null;
        MessageNumberCollection msgNums = null;
        string input = null;

        // Determine charset to use. This will let us perform search of
        // messages written in the charset of the current computer.
        string localComputerCharset = System.Text.Encoding.Default.WebName;

        // -----------------------------------------------------------------
        // Section 1: Search in Subject field.
        // Demonstrates text search and usage of charsets (for international
        // applications) and quoted strings (for searching arbitrary text,
        // including spaces, quotes, and other special characters).
        // -----------------------------------------------------------------

        Console.WriteLine("Input string to be searched in Subject field:");
        input = Console.ReadLine();

        // 1.1: US-ASCII search (case-insensitive).

        // 1.1.1: Search for UIDs.
        uids = (UidCollection)imp.Search(true,
            "SUBJECT " + ImapUtils.ToQuotedString(input), null);

        Console.WriteLine();
        Console.WriteLine("UIDs of found messages (US-ASCII mode):");
        Console.WriteLine(uids.ToString());

        // 1.1.2: Search for ordinal message numbers. This demonstrates
        // how to get search results as message numbers rather UIDs.
        msgNums = (MessageNumberCollection)imp.Search(false,
            "SUBJECT " + ImapUtils.ToQuotedString(input), null);

        Console.WriteLine();
        Console.WriteLine("Message numbers of found messages (US-ASCII mode):");
        Console.WriteLine(msgNums.ToString());

        // 1.2: Search with support of international characters of the current
        // computer's charset. US-ASCII characters will be searched in case-insensitive
        // manner but there is no such guarantee for non-US-ASCII characters.
        uids = (UidCollection)imp.Search(true,
            "SUBJECT " + ImapUtils.ToQuotedString(input),
            localComputerCharset);

        Console.WriteLine();
        Console.WriteLine("UIDs of found messages (" + localComputerCharset + " mode):");
        Console.WriteLine(uids.ToString());

        // 1.3: Search with support of UTF-8. This will let us perform search of any text in any language.
        uids = (UidCollection)imp.Search(true,
            "SUBJECT " + ImapUtils.ToUtf8QuotedString(input),
            System.Text.Encoding.UTF8.WebName);

        Console.WriteLine();
        Console.WriteLine("UIDs of found messages (UTF-8 mode):");
        Console.WriteLine(uids.ToString());

        // -----------------------------------------------------------------
        // Section 2: Search of messages with specific flags set.
        // Also demonstrates how to specify OR and AND conditions.
        // -----------------------------------------------------------------

        // 2.1: Search for messages having \Deleted flag set.
        uids = (UidCollection)imp.Search(true, "DELETED", null);

        Console.WriteLine();
        Console.WriteLine(@"UIDs of \Deleted messages:");
        Console.WriteLine(uids.ToString());

        // 2.2: Search for messages having \Deleted or \Seen flags set.
        uids = (UidCollection)imp.Search(true, "OR DELETED SEEN", null);

        Console.WriteLine();
        Console.WriteLine(@"UIDs of \Deleted or \Seen messages:");
        Console.WriteLine(uids.ToString());

        // 2.3: Search for messages having \Deleted or \Seen or \Answered flags set.
        uids = (UidCollection)imp.Search(true, "OR (OR DELETED SEEN) ANSWERED", null);

        Console.WriteLine();
        Console.WriteLine(@"UIDs of \Deleted or \Seen or \Answered messages:");
        Console.WriteLine(uids.ToString());

        // 2.4: Search for messages having \Deleted or (\Seen and \Answered) flags set.
        uids = (UidCollection)imp.Search(true, "OR DELETED (SEEN ANSWERED)", null);

        Console.WriteLine();
        Console.WriteLine(@"UIDs of \Deleted or (\Seen and \Answered) messages:");
        Console.WriteLine(uids.ToString());

        // ------------------------------------------------------------------
        // Section 3: Search of messages meeting complex criteria.
        // The criteria set (in C# syntax):
        // (size > 10000 || Flagged || !Spam) && BodyContains(string).
        // I.e. the message is larger than 10000 bytes or flagged or not spam
        // (there is no standard \Spam attribute so custom $Spam attribute
        // is used) and, besides that, the message must contain the specified
        // string (taken from user input) in the body.
        // ------------------------------------------------------------------

        uids = (UidCollection)imp.Search(true,
            "OR (OR LARGER 10000 FLAGGED) UNKEYWORD " + ImapUtils.ToQuotedString("$Spam") +
            " BODY " + ImapUtils.ToQuotedString(input), null);

        Console.WriteLine();
        Console.WriteLine("UIDs of messages meeting complex criteria:");
        Console.WriteLine(uids.ToString());

        // Using helper methods to repeat the same search:
        // (size > 10000 || Flagged || !Spam) && BodyContains(string).
        uids = (UidCollection)imp.Search(true,
            ImapUtils.AllOf(ImapUtils.AnyOf(
            "LARGER 10000", "FLAGGED", "UNKEYWORD " + ImapUtils.ToQuotedString("$Spam")),
            "BODY " + ImapUtils.ToQuotedString(input)), null);

        Console.WriteLine();
        Console.WriteLine("The same search repeated with helper methods:");
        Console.WriteLine(uids.ToString());

        // Disconnect from the server.
        imp.Disconnect();
    }
}

Imports System
Imports MailBee
Imports MailBee.ImapMail

Module Sample
    Sub Main()
        Dim imp As New Imap

        ' In the log, you can find the actual search queries sent to the server.
        imp.Log.Filename = "C:\Temp\log.txt"
        imp.Log.Enabled = True
        imp.Log.Clear()

        imp.Connect("imap.company.com")
        imp.Login("jdoe@company.com", "secret")

        ' Select Inbox folder.
        imp.SelectFolder("INBOX")

        Dim uids As UidCollection = Nothing
        Dim msgNums As MessageNumberCollection = Nothing
        Dim input As String = Nothing

        ' Determine charset to use. This will let us perform search of
        ' messages written in the charset of the current computer.
        Dim localComputerCharset As String = System.Text.Encoding.Default.WebName

        ' -----------------------------------------------------------------
        ' Section 1: Search in Subject field.
        ' Demonstrates text search and usage of charsets (for international
        ' applications) and quoted strings (for searching arbitrary text,
        ' including spaces, quotes, and other special characters).
        ' -----------------------------------------------------------------

        Console.WriteLine("Input string to be searched in Subject field:")
        input = Console.ReadLine()

        ' 1.1: US-ASCII search (case-insensitive).
        ' 1.1.1: Search for UIDs.
        uids = CType(imp.Search(True, "SUBJECT " & ImapUtils.ToQuotedString(input), _
            Nothing), UidCollection)

        Console.WriteLine()
        Console.WriteLine("UIDs of found messages (US-ASCII mode):")
        Console.WriteLine(uids.ToString())

        ' 1.1.2: Search for ordinal message numbers. This demonstrates
        ' how to get search results as message numbers rather UIDs.
        msgNums = CType(imp.Search(False, "SUBJECT " & ImapUtils.ToQuotedString(input), _
            Nothing), MessageNumberCollection)

        Console.WriteLine()
        Console.WriteLine("Message numbers of found messages (US-ASCII mode):")
        Console.WriteLine(msgNums.ToString())

        ' 1.2: Search with support of international characters of the current
        ' computer's charset. US-ASCII characters will be searched in case-insensitive
        ' manner but there is no such guarantee for non-US-ASCII characters.
        uids = CType(imp.Search(True, "SUBJECT " & ImapUtils.ToQuotedString(input), _
            localComputerCharset), UidCollection)

        Console.WriteLine()
        Console.WriteLine("UIDs of found messages (" & localComputerCharset & " mode):")
        Console.WriteLine(uids.ToString())

        ' 1.3: Search with support of UTF-8. This will let us perform search of any text in any language.
        uids = CType(imp.Search(True, "SUBJECT " & ImapUtils.ToUtf8QuotedString(input), _
            System.Text.Encoding.UTF8.WebName), UidCollection)

        Console.WriteLine()
        Console.WriteLine("UIDs of found messages (UTF-8 mode):")
        Console.WriteLine(uids.ToString())

        ' -----------------------------------------------------------------
        ' Section 2: Search of messages with specific flags set.
        ' Also demonstrates how to specify OR and AND conditions.
        ' -----------------------------------------------------------------

        ' 2.1: Search for messages having \Deleted flag set.
        uids = CType(imp.Search(True, "DELETED", Nothing), UidCollection)

        Console.WriteLine()
        Console.WriteLine("UIDs of \Deleted messages:")
        Console.WriteLine(uids.ToString())

        ' 2.2: Search for messages having \Deleted or \Seen flags set.
        uids = CType(imp.Search(True, "OR DELETED SEEN", Nothing), UidCollection)

        Console.WriteLine()
        Console.WriteLine("UIDs of \Deleted or \Seen messages:")
        Console.WriteLine(uids.ToString())

        ' 2.3: Search for messages having \Deleted or \Seen or \Answered flags set.
        uids = CType(imp.Search(True, "OR (OR DELETED SEEN) ANSWERED", Nothing), UidCollection)

        Console.WriteLine()
        Console.WriteLine("UIDs of \Deleted or \Seen or \Answered messages:")
        Console.WriteLine(uids.ToString())

        ' 2.4: Search for messages having \Deleted or (\Seen and \Answered) flags set.
        uids = CType(imp.Search(True, "OR DELETED (SEEN ANSWERED)", Nothing), UidCollection)

        Console.WriteLine()
        Console.WriteLine("UIDs of \Deleted or (\Seen and \Answered) messages:")
        Console.WriteLine(uids.ToString())

        ' ------------------------------------------------------------------
        ' Section 3: Search of messages meeting complex criteria.
        ' The criteria set (in Visual Baisc syntax):
        ' (size > 10000 OrElse Flagged OrElse Not Spam) AndAlso BodyContains(string).
        ' I.e. the message is larger than 10000 bytes or flagged or not spam
        ' (there is no standard \Spam attribute so custom $Spam attribute
        ' is used) and, besides that, the message must contain the specified
        ' string (taken from user input) in the body.
        ' ------------------------------------------------------------------

        uids = CType(imp.Search(True, "OR (OR LARGER 10000 FLAGGED) UNKEYWORD " & _
            ImapUtils.ToQuotedString("$Spam") & " BODY " & _
            ImapUtils.ToQuotedString(input), Nothing), UidCollection)

        Console.WriteLine()
        Console.WriteLine("UIDs of messages meeting complex criteria:")
        Console.WriteLine(uids.ToString())

        ' Using helper methods to repeat the same search:
        ' (size > 10000 || Flagged || !Spam) && BodyContains(string).
        uids = CType(imp.Search(True, _
            ImapUtils.AllOf(ImapUtils.AnyOf( _
            "LARGER 10000", "FLAGGED", "UNKEYWORD " + ImapUtils.ToQuotedString("$Spam")), _
            "BODY " + ImapUtils.ToQuotedString(input)), Nothing), UidCollection)

        Console.WriteLine()
        Console.WriteLine("The same search repeated with helper methods:")
        Console.WriteLine(uids.ToString())

        imp.Disconnect()
    End Sub
End Module