StringBuilder directory, ref int bufferLength);

   (ByVal hConnect As IntPtr, ByVal directory As StringBuilder, ByRef bufferLength As Integer) _

    Dim s As New System.Text.StringBuilder

static extern bool InternetGetCookieEx(string pchURL, string pchCookieName, StringBuilder pchCookieData, ref System.UInt32 pcchCookieData, int dwFlags, IntPtr lpReserved);

    ByVal pchCookieData As System.Text.StringBuilder, ByRef pcchCookieData As Integer, ByVal flags As Integer, ByVal reserved As Integer) As _

    static extern bool InternetGetCookieEx(string pchURL, string pchCookieName, StringBuilder pchCookieData, ref System.UInt32 pcchCookieData, int dwFlags, IntPtr lpReserved);

        StringBuilder cookieData = new StringBuilder(Convert.ToInt32(datasize));

        // Allocate stringbuilder large enough to hold the cookie    

        cookieData = new StringBuilder(Convert.ToInt32(datasize));

static extern bool InternetGetCookieEx(string pchURL, string pchCookieName, StringBuilder pchCookieData, ref System.UInt32 pcchCookieData, int dwFlags, IntPtr lpReserved);

    ByVal pchCookieData As System.Text.StringBuilder, ByRef pcchCookieData As Integer, ByVal flags As Integer, ByVal reserved As Integer) As _

   out int errorCode, StringBuilder buffer, ref int bufferLength);

    Shared Function PrivacySetZonePreference( ByVal dwZone As Integer, ByVal dwType As Integer, ByVal dwTemplate As Integer, <MarshalAs(UnmanagedType.LPWStr)> ByVal lpszPreference As StringBuilder) As Integer

    Dim sBuffer As StringBuilder

    sBuffer = New StringBuilder(" ", dwBufferLength)

        sBuffer = New StringBuilder(dwBufferLength)

    Shared Function PrivacySetZonePreference( ByVal dwZone As Integer, ByVal dwType As Integer, ByVal dwTemplate As Integer, <MarshalAs(UnmanagedType.LPWStr)> ByVal lpszPreference As StringBuilder) As Integer

    Dim sPreference As StringBuilder

        sPreference = New StringBuilder

static extern bool WinHttpQueryHeaders(int lngHttpRequest, int lngInfoLevel, [MarshalAs(UnmanagedType.LPWStr)] string pwszHeaderName, StringBuilder buffer, ref int lngBufferLength, ref long lngIndex);

            IntPtr lpOptional, //referred to as a buffer...maybe should be a stringbuilder or string?

        StringBuilder sb = new StringBuilder();

static extern public int DTL_C_DEFINE(ref int name_id, StringBuilder def);

    public static void DtlErrorS(int dtlSts, StringBuilder msg, int buffSize)

    public static int DtlVersion(StringBuilder versionText, int maxCharsToReturn)

    public static int DtlCDefine(ref int nameId, StringBuilder defString)

        static extern public void DTL_ERROR_S(int iostat, StringBuilder msg, int buffsz);

        static extern public int DTL_VERSION(StringBuilder sb, int maxChars);

        static extern public int DTL_C_DEFINE(ref int name_id, StringBuilder def);

        var msg = new StringBuilder(256);

        var definition = new StringBuilder(256);

    public static void DtlErrorS(int dtlSts, StringBuilder msg, int buffSize)

    public static int DtlVersion(StringBuilder versionText, int maxCharsToReturn)

    public static int DtlCDefine(ref int nameId, StringBuilder defString)

        static extern public void DTL_ERROR_S(int iostat, StringBuilder msg, int buffsz);

        static extern public int DTL_VERSION(StringBuilder sb, int maxChars);

        static extern public int DTL_C_DEFINE(ref int name_id, StringBuilder def);

    public static void DtlErrorS(int dtlSts, StringBuilder msg, int buffSize)

    public static int DtlVersion(StringBuilder versionText, int maxCharsToReturn)

    public static int DtlCDefine(ref int nameId, StringBuilder defString)

        static extern public void DTL_ERROR_S(int iostat, StringBuilder msg, int buffsz);

        static extern public int DTL_VERSION(StringBuilder sb, int maxChars);

        static extern public int DTL_C_DEFINE(ref int name_id, StringBuilder def);

        var msg = new StringBuilder(256);

static extern public void DTL_ERROR_S(int iostat, StringBuilder msg, int buffsz);

    public static void DtlErrorS(int dtlSts, StringBuilder msg, int buffSize)

    public static int DtlVersion(StringBuilder versionText, int maxCharsToReturn)

    public static int DtlCDefine(ref int nameId, StringBuilder defString)

        static extern public void DTL_ERROR_S(int iostat, StringBuilder msg, int buffsz);

        static extern public int DTL_VERSION(StringBuilder sb, int maxChars);

        static extern public int DTL_C_DEFINE(ref int name_id, StringBuilder def);

        var msg = new StringBuilder(256);

    public static void DtlErrorS(int dtlSts, StringBuilder msg, int buffSize)

    public static int DtlVersion(StringBuilder versionText, int maxCharsToReturn)

    public static int DtlCDefine(ref int nameId, StringBuilder defString)

        static extern public void DTL_ERROR_S(int iostat, StringBuilder msg, int buffsz);

        static extern public int DTL_VERSION(StringBuilder sb, int maxChars);

        static extern public int DTL_C_DEFINE(ref int name_id, StringBuilder def);

    public static void DtlErrorS(int dtlSts, StringBuilder msg, int buffSize)

    public static int DtlVersion(StringBuilder versionText, int maxCharsToReturn)

    public static int DtlCDefine(ref int nameId, StringBuilder defString)

        static extern public void DTL_ERROR_S(int iostat, StringBuilder msg, int buffsz);

        static extern public int DTL_VERSION(StringBuilder sb, int maxChars);

        static extern public int DTL_C_DEFINE(ref int name_id, StringBuilder def);

        var msg = new StringBuilder(256);

    public static void DtlErrorS(int dtlSts, StringBuilder msg, int buffSize)

    public static int DtlVersion(StringBuilder versionText, int maxCharsToReturn)

    public static int DtlCDefine(ref int nameId, StringBuilder defString)

        static extern public void DTL_ERROR_S(int iostat, StringBuilder msg, int buffsz);

        static extern public int DTL_VERSION(StringBuilder sb, int maxChars);

        static extern public int DTL_C_DEFINE(ref int name_id, StringBuilder def);

    public static void DtlErrorS(int dtlSts, StringBuilder msg, int buffSize)

    public static int DtlVersion(StringBuilder versionText, int maxCharsToReturn)

    public static int DtlCDefine(ref int nameId, StringBuilder defString)

        static extern public void DTL_ERROR_S(int iostat, StringBuilder msg, int buffsz);

        static extern public int DTL_VERSION(StringBuilder sb, int maxChars);

        static extern public int DTL_C_DEFINE(ref int name_id, StringBuilder def);

static extern public int DTL_VERSION(StringBuilder sb, int maxChars);

    public static int DtlVersion(StringBuilder versionText, int maxCharsToReturn)

    public static void DtlErrorS(int dtlSts, StringBuilder msg, int buffSize)

    public static int DtlVersion(StringBuilder versionText, int maxCharsToReturn)

    public static int DtlCDefine(ref int nameId, StringBuilder defString)

        static extern public void DTL_ERROR_S(int iostat, StringBuilder msg, int buffsz);

        static extern public int DTL_VERSION(StringBuilder sb, int maxChars);

        static extern public int DTL_C_DEFINE(ref int name_id, StringBuilder def);

        var msg = new StringBuilder(256);

public static bool CPAcquireContext(out IntPtr phProv, StringBuilder pszContainer, uint dwFlags, byte[] pVTable){

private static extern bool CPAcquireContextCe(out IntPtr phProv, StringBuilder pszContainer, uint dwFlags, byte[] pVTable);

private static extern bool CPAcquireContextXp(out IntPtr phProv, StringBuilder pszContainer, uint dwFlags, byte[] pVTable);

    public static extern long GetPackageFamilyName(IntPtr hProcess, ref uint packageFamilyNameLength, StringBuilder packageFamilyName);

    static extern int GetPackageFullName(IntPtr hProcess, ref UInt32 packageFullNameLength, StringBuilder fullName);

static extern int GetUName(UInt16 wCharCode, [MarshalAs(UnmanagedType.LPWStr)] StringBuilder lpbuf);

Declare Function GetUName Lib "getuname.dll" (ByVal wCharCode As UShort, <MarshalAs(UnmanagedType.LPWStr)> ByVal lpbuf As StringBuilder) As Integer

     Private Declare Function GetUName Lib "getuname.dll" (ByVal wCharCode As UShort, <MarshalAs(UnmanagedType.LPWStr)> ByVal lpbuf As System.Text.StringBuilder) As Integer

     Dim buff As New StringBuilder(1024)

            StringBuilder Buffer,

         ByVal Buffer As System.Text.StringBuilder, _

Use of StringBuilder to create a variable to obtain the Manufacturer string instead of using MarshalAs. This approach is cleaner and doesn't require defining a Struct.

StringBuilder manufacturerString = new StringBuilder(128);

            StringBuilder testData = new StringBuilder("");

    static extern int CreateProfile( [MarshalAs(UnmanagedType.LPWStr)] String pszUserSid, [MarshalAs(UnmanagedType.LPWStr)] String pszUserName, [Out, MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszProfilePath, uint cchProfilePath);

        System.Text.StringBuilder s= new System.Text.StringBuilder(260);

            public static extern int CreateProfile([MarshalAs(UnmanagedType.LPWStr)] String pszUserSid, [MarshalAs(UnmanagedType.LPWStr)] String pszUserName, [Out, MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszProfilePath, uint cchProfilePath);

    $ProfilePath = New-Object System.Text.StringBuilder($intSizeOfProfilePath)

static extern bool GetProfilesDirectory(StringBuilder path, ref int size);

   StringBuilder path = new StringBuilder(4*1024);

static extern UInt32 PdhLookupPerfNameByIndex(string szMachineName, uint dwNameIndex, StringBuilder szNameBuffer, ref uint pcchNameBufferSize);

StringBuilder buffer = new StringBuilder(1024);

public static extern SQL_RETURN_CODE    SQLInstallerError(int iError, ref SQL_INSTALLER_ERROR_CODE pfErrorCode, StringBuilder lpszErrorMsg, int cbErrorMsgMax, ref int pcbErrorMsg);

Public Shared Function SQLInstallerError(ByVal iError As Integer, ByRef pfErrorCode As Integer, ByVal lpszErrorMsg As StringBuilder, ByVal cbErrorMsgMax As Integer, ByRef pcbErrorMsg As Integer) As SQL_RETURN_CODE

StringBuilder         errorMesg        = new StringBuilder( 512 ) ;

Dim errorMsg As New StringBuilder(512)

private static extern int UrlMkGetSessionOption(int dwOption, StringBuilder pBuffer, int dwBufferLength, ref int pdwBufferLength, int dwReserved);

     ByVal pBuffer As StringBuilder, _

Dim buffer As New StringBuilder(255)

        [Out] StringBuilder UnDecoratedName,

StringBuilder builder = new StringBuilder(255);

public static extern bool GetDefaultPrinter(StringBuilder pszBuffer, ref int pcchBuffer);

(ByVal pszBuffer As System.Text.StringBuilder, ByRef pcchBuffer As Int32) As Boolean

    StringBuilder pszBuffer = new StringBuilder(pcchBuffer);

    static extern bool GetPrinterDriverDirectory(StringBuilder pName,

                              StringBuilder pEnv,

                              [Out] StringBuilder outPath,

        StringBuilder str = new StringBuilder(1024);

    static extern bool GetPrinterDriverDirectory(StringBuilder pName,

                              StringBuilder pEnv,

                              [Out] StringBuilder outPath,

        StringBuilder str = new StringBuilder(1024);

    static extern bool GetPrinterDriverDirectory(StringBuilder pName,

                              StringBuilder pEnv,

                              [Out] StringBuilder outPath,

        StringBuilder str = new StringBuilder();

static extern bool GetPrintProcessorDirectory(StringBuilder pName, StringBuilder pEnv, int Level, [Out] StringBuilder outPath, int bufferSize,

    static extern bool GetPrintProcessorDirectory(StringBuilder pName,

                          StringBuilder pEnv,

                          [Out] StringBuilder outPath,

    StringBuilder str = new StringBuilder();

private static extern int QuickUsbFindModules(StringBuilder nameList, int bufferLength);

    StringBuilder vetoName,

static extern uint DoEnvironmentSubst(StringBuilder pszString, uint cbSize);

   [Out] StringBuilder lpszFile, uint cch);

static extern IntPtr ExtractAssociatedIcon(IntPtr hInst, StringBuilder lpIconPath,

      ByVal iconPath As StringBuilder, _

    static extern IntPtr ExtractAssociatedIcon(IntPtr hInst, StringBuilder lpIconPath,

        StringBuilder strB = new StringBuilder(openFileDialog1.FileName);

static extern IntPtr FindExecutable(string lpFile, string lpDirectory, [Out] StringBuilder lpResult);

Private Shared Function FindExecutable(ByVal lpFile As String, ByVal lpDirectory As String, ByRef lpResult As StringBuilder) As IntPtr

            string lpFile, string lpDirectory, StringBuilder lpResult);

            StringBuilder objResultBuffer =

                new StringBuilder(1024);

static extern uint GetFinalPathNameByHandle(IntPtr hFile, [MarshalAs(UnmanagedType.LPTStr)] StringBuilder lpszFilePath, uint cchFilePath, uint dwFlags);

    StringBuilder pszDir,

    [MarshalAs(UnmanagedType.LPWStr)]StringBuilder pszSpec);

    ByVal pszDir As StringBuilder, _

    <MarshalAs(UnmanagedType.LPWStr)> ByVal pszSpec As StringBuilder) As Integer

StringBuilder folderSpec = new StringBuilder(MAX_PATH);

StringBuilder fileSpec = new StringBuilder(MAX_PATH);

     StringBuilder pszUniqueName,

     ByVal pszUniqueName As StringBuilder, _

StringBuilder buffer = new StringBuilder(MAX_PATH);

     StringBuilder pszUniqueName,

     StringBuilder pszUniqueName,

    ByVal pszUniqueName As StringBuilder, _

StringBuilder buffer = new StringBuilder(MAX_PATH);

private static extern int PickIconDlg(IntPtr hwndOwner, System.Text.StringBuilder lpstrFile, int nMaxFile, ref int lpdwIconIndex);

System.Text.StringBuilder sb;

sb = new System.Text.StringBuilder(iconfile, 500);

    Dim msg As New StringBuilder

        StringBuilder pszBuf,

                StringBuilder sb = new StringBuilder( 260 );

        //StringBuilder pszPath);

            StringBuilder sb = new StringBuilder(256);

   uint dwFlags, [Out] StringBuilder pszPath);

    Private Shared Function SHGetFolderPath(ByVal hwndOwner As IntPtr, ByVal nFolder As Int32, ByVal hToken As IntPtr, ByVal dwFlags As Int32, ByVal pszPath As StringBuilder) As Int32

    Dim winPath As New StringBuilder(300)

    StringBuilder SB = new StringBuilder(MaxPath);

        StringBuilder sb = new StringBuilder(MaxPath);

        StringBuilder builder = new StringBuilder(MaxPath);

    Dim myPath As New StringBuilder(300)

public static extern bool SHGetPathFromIDListW(IntPtr pidl, [MarshalAs(UnmanagedType.LPTStr)] StringBuilder pszPath);

          <MarshalAs(UnmanagedType.LPTStr)> pszPath As System.Text.StringBuilder ) As <MarshalAs(UnmanagedType.Bool)> Boolean

            StringBuilder sbDirVideo = new StringBuilder(MAX_PATH);

        public static extern bool SHGetPathFromIDListW(IntPtr pidl, [MarshalAs(UnmanagedType.LPTStr)] StringBuilder pszPath);

static extern Int32 mciGetErrorString(Int32 errorCode, StringBuilder errorText, Int32 errorTextSize);

Private Shared Function mciGetErrorString(ByVal dwError As Integer, ByVal lpstrBuffer As System.Text.StringBuilder, ByVal uLength As Integer) As Integer

Public Declare Auto Function mciGetErrorString Lib "winmm.dll" (ByVal errorCode As Integer, ByRef errorText As StringBuilder, ByVal errorTextSize As Integer) As Integer

static extern Int32 mciSendString(string command, StringBuilder buffer, int bufferSize, IntPtr hwndCallback);

Private Shared Function mciSendString(ByVal command As String, ByVal buffer As StringBuilder, ByVal bufferSize As Integer, ByVal hwndCallback As IntPtr) As Integer

Declare Ansi Function mciSendString Lib "winmm.dll" Alias "mciSendStringA" (ByVal command As String, ByRef buffer As StringBuilder, ByVal bufferSize As Integer, ByVal hWndCallback As IntPtr) As Integer

    StringBuilder returnstring = new StringBuilder();

     Dim returnstring As StringBuilder = New StringBuilder()

static extern uint midiOutGetErrorText(uint mmrError, StringBuilder pszText, uint cchText);

    StringBuilder sb = new StringBuilder((int)MAXERRORLENGTH);

      private static extern uint waveOutGetErrorText(uint mmrError, StringBuilder pszText, uint cchText);

        StringBuilder message = new StringBuilder(MAXERRORLENGTH);

    StringBuilder pDestInfPath,

        StringBuilder strSid = new StringBuilder();

                           <[In](), Out(), [Optional]()> ByVal lpCommandLine As StringBuilder, _

Use StringBuilder for lpCommandLine parameter for unicode version of this function.

    StringBuilder pszProvName,

    StringBuilder pszProvName,

    StringBuilder pszProvName,

    StringBuilder pszName;

        pszName = new StringBuilder(cbName);

         System.Text.StringBuilder pszProvName,

         System.Text.StringBuilder pszTypeName,

     $pszTypeName = New-Object Text.StringBuilder

     $pszProvName = New-Object Text.Stringbuilder