_UABrowsePathParser Interface

Exposes OpcLabs.EasyOpc.UA.Navigation.Parsing.UABrowsePathParser to COM clients.

Object Model

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<CLSCompliantAttribute(False)>
<ComVisibleAttribute(True)>
<GuidAttribute("7535B40D-25FC-4689-93FC-DA9D3C0654FB")>
<InterfaceTypeAttribute(ComInterfaceType.InterfaceIsDual)>
Public Interface _UABrowsePathParser

'Usage
 
Dim instance As _UABrowsePathParser

[CLSCompliant(false)]
[ComVisible(true)]
[Guid("7535B40D-25FC-4689-93FC-DA9D3C0654FB")]
[InterfaceType(ComInterfaceType.InterfaceIsDual)]
public interface _UABrowsePathParser

[CLSCompliant(false)]
[ComVisible(true)]
[Guid("7535B40D-25FC-4689-93FC-DA9D3C0654FB")]
[InterfaceType(ComInterfaceType.InterfaceIsDual)]
public interface class _UABrowsePathParser

Remarks

This member or type is for use from COM. It is not meant to be used from .NET or Python. Refer to the corresponding .NET member or type instead, if you are developing in .NET or Python.

Example

// Parses an absolute  OPC-UA browse path and displays its starting node and elements.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in Object Pascal (Delphi) on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-OP .
// Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.

class procedure Parse.Main;
var
  BrowsePath: _UABrowsePath;
  BrowsePathElement: _UABrowsePathElement;
  BrowsePathParser: OpcLabs_EasyOpcUA_TLB._UABrowsePathParser;
  Count: Cardinal;
  Element: OleVariant;
  ElementEnumerator: IEnumVariant;
begin
  BrowsePathParser := CoUABrowsePathParser.Create;

  try
    BrowsePath := BrowsePathParser.Parse('[ObjectsFolder]/Data/Static/UserScalar');
  except
    on E: EOleException do
    begin
      WriteLn(Format('*** Failure: %s', [E.GetBaseException.Message]));
      Exit;
    end;
  end;

  // Display results
  WriteLn('StartingNodeId: ', BrowsePath.StartingNodeId.ToString);

  WriteLn('Elements:');
  ElementEnumerator := BrowsePath.Elements.GetEnumerator;
  while (ElementEnumerator.Next(1, Element, Count) = S_OK) do
  begin
    BrowsePathElement := IUnknown(Element) as _UABrowsePathElement;
    WriteLn(BrowsePathElement.ToString);
  end;

  // Example output:
  // StartingNodeId: ObjectsFolder
  // Elements:
  // /Data
  // /Static
  // /UserScalar

end;

// Parses an absolute  OPC-UA browse path and displays its starting node and elements.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in PHP on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-PHP .
// Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.


$BrowsePathParser = new COM("OpcLabs.EasyOpc.UA.Navigation.Parsing.UABrowsePathParser");

try
{
    $BrowsePath = $BrowsePathParser->Parse("[ObjectsFolder]/Data/Static/UserScalar");
}
catch (com_exception $e)
{
    printf("*** Failure: %s\n", $e->getMessage());
    exit();
}

// Display results
printf("StartingNodeId: %s\n", $BrowsePath->StartingNodeId);

printf("Elements:\n");

for ($i = 0; $i < $BrowsePath->Elements->Count; $i++)
{
    printf("%s\n", $BrowsePath->Elements[$i]);
}

// Example output:
// StartingNodeId: ObjectsFolder
// Elements:
// /Data
// /Static
// /UserScalar

REM Parses an absolute  OPC-UA browse path and displays its starting node and elements.
REM
REM Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
REM OPC client and subscriber examples in Visual Basic on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VB .
REM Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
REM a commercial license in order to use Online Forums, and we reply to every post.

Private Sub Parse_Main_Command_Click()
    OutputText = ""
    
    Dim BrowsePathParser As New UABrowsePathParser

    On Error Resume Next
    Dim browsePath As UABrowsePath
    Set browsePath = BrowsePathParser.Parse("[ObjectsFolder]/Data/Static/UserScalar")
    If Err.Number <> 0 Then
        OutputText = OutputText & "*** Failure: " & Err.Source & ": " & Err.Description & vbCrLf
        Exit Sub
    End If
    On Error GoTo 0
    
    ' Display results
    OutputText = OutputText & "StartingNodeId: " & browsePath.StartingNodeId & vbCrLf
    
    OutputText = OutputText & "Elements:" & vbCrLf
    Dim BrowsePathElement: For Each BrowsePathElement In browsePath.Elements
        OutputText = OutputText & BrowsePathElement & vbCrLf
    Next

    ' Example output:
    'StartingNodeId: ObjectsFolder
    'Elements:
    '/Data
    '/Static
    '/UserScalar
End Sub

Rem Parses an absolute  OPC-UA browse path and displays its starting node and elements.
Rem
Rem Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
Rem OPC client and subscriber examples in VBScript on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VBScript .
Rem Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
Rem a commercial license in order to use Online Forums, and we reply to every post.

Option Explicit

Dim BrowsePathParser: Set BrowsePathParser = CreateObject("OpcLabs.EasyOpc.UA.Navigation.Parsing.UABrowsePathParser")
On Error Resume Next
Dim BrowsePath: Set BrowsePath = BrowsePathParser.Parse("[ObjectsFolder]/Data/Static/UserScalar")
If Err.Number <> 0 Then
    WScript.Echo "*** Failure: " & Err.Source & ": " & Err.Description
    WScript.Quit
End If
On Error Goto 0

' Display results
WScript.Echo "StartingNodeId: " & BrowsePath.StartingNodeId

WScript.Echo "Elements:"
Dim BrowsePathElement: For Each BrowsePathElement In BrowsePath.Elements
    WScript.Echo BrowsePathElement
Next

Object Pascal
PHP
Visual Basic (VB 6.0)
VBScript

// Parses a relative OPC-UA browse path and displays its elements.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in Object Pascal (Delphi) on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-OP .
// Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.

class procedure ParseRelative.Main;
var
  BrowsePathElement: _UABrowsePathElement;
  BrowsePathElements: _UABrowsePathElementCollection;
  BrowsePathParser: OpcLabs_EasyOpcUA_TLB._UABrowsePathParser;
  Count: Cardinal;
  Element: OleVariant;
  ElementEnumerator: IEnumVariant;
begin
  BrowsePathParser := CoUABrowsePathParser.Create;

  try
    BrowsePathElements := BrowsePathParser.ParseRelative('/Data.Dynamic.Scalar.CycleComplete');
  except
    on E: EOleException do
    begin
      WriteLn(Format('*** Failure: %s', [E.GetBaseException.Message]));
      Exit;
    end;
  end;

  // Display results
  ElementEnumerator := BrowsePathElements.GetEnumerator;
  while (ElementEnumerator.Next(1, Element, Count) = S_OK) do
  begin
    BrowsePathElement := IUnknown(Element) as _UABrowsePathElement;
    WriteLn(BrowsePathElement.ToString);
  end;

  // Example output:
  // /Data
  // .Dynamic
  // .Scalar
  // .CycleComplete

end;

// Parses a relative OPC-UA browse path and displays its elements.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in PHP on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-PHP .
// Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.


$BrowsePathParser = new COM("OpcLabs.EasyOpc.UA.Navigation.Parsing.UABrowsePathParser");

try
{
    $BrowsePathElements = $BrowsePathParser->ParseRelative("/Data.Dynamic.Scalar.CycleComplete");
}
catch (com_exception $e)
{
    printf("*** Failure: %s\n", $e->getMessage());
    exit();
}

// Display results
for ($i = 0; $i < $BrowsePathElements->Count; $i++)
{
    printf("%s\n", $BrowsePathElements[$i]);
}

// Example output:
// /Data
// .Dynamic
// .Scalar
// .CycleComplete

REM Parses a relative OPC-UA browse path and displays its elements.
REM
REM Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
REM OPC client and subscriber examples in Visual Basic on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VB .
REM Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
REM a commercial license in order to use Online Forums, and we reply to every post.

Private Sub ParseRelative_Main_Command_Click()
    OutputText = ""
    Dim BrowsePathParser As New UABrowsePathParser

    On Error Resume Next
    Dim BrowsePathElements As UABrowsePathElementCollection
    Set BrowsePathElements = BrowsePathParser.ParseRelative("/Data.Dynamic.Scalar.CycleComplete")
    If Err.Number <> 0 Then
        OutputText = OutputText & "*** Failure: " & Err.Source & ": " & Err.Description & vbCrLf
        Exit Sub
    End If
    On Error GoTo 0
    
    ' Display results
    Dim BrowsePathElement: For Each BrowsePathElement In BrowsePathElements
        OutputText = OutputText & BrowsePathElement & vbCrLf
    Next

    ' Example output:
    '/Data
    '.Dynamic
    '.Scalar
    '.CycleComplete
End Sub

Rem Parses a relative OPC-UA browse path and displays its elements.
Rem
Rem Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
Rem OPC client and subscriber examples in VBScript on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VBScript .
Rem Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
Rem a commercial license in order to use Online Forums, and we reply to every post.

Option Explicit

Dim BrowsePathParser: Set BrowsePathParser = CreateObject("OpcLabs.EasyOpc.UA.Navigation.Parsing.UABrowsePathParser")
On Error Resume Next
Dim BrowsePathElements: Set BrowsePathElements = BrowsePathParser.ParseRelative("/Data.Dynamic.Scalar.CycleComplete")
If Err.Number <> 0 Then
    WScript.Echo "*** Failure: " & Err.Source & ": " & Err.Description
    WScript.Quit
End If
On Error Goto 0

' Display results
Dim BrowsePathElement: For Each BrowsePathElement In BrowsePathElements
    WScript.Echo BrowsePathElement
Next

Object Pascal
PHP
Visual Basic (VB 6.0)
VBScript

// Attempts to parse an absolute  OPC-UA browse path and displays its starting node and elements.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in Object Pascal (Delphi) on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-OP .
// Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.

class procedure TryParse.Main;
var
  BrowsePath: _UABrowsePath;
  BrowsePathElement: _UABrowsePathElement;
  BrowsePathParser: OpcLabs_EasyOpcUA_TLB._UABrowsePathParser;
  BrowsePathResult: OleVariant;
  Count: Cardinal;
  Element: OleVariant;
  ElementEnumerator: IEnumVariant;
  StringParsingError: _StringParsingError;
begin
  BrowsePathParser := CoUABrowsePathParser.Create;

  StringParsingError := BrowsePathParser.TryParse('[ObjectsFolder]/Data/Static/UserScalar', BrowsePathResult);

  // Display results
  if StringParsingError <> nil then
  begin
    WriteLn('*** Error: ', StringParsingError.ToString);
    Exit;
  end;

  BrowsePath := IUnknown(BrowsePathResult) as _UABrowsePath;
  WriteLn('StartingNodeId: ', BrowsePath.StartingNodeId.ToString);

  WriteLn('Elements:');
  ElementEnumerator := BrowsePath.Elements.GetEnumerator;
  while (ElementEnumerator.Next(1, Element, Count) = S_OK) do
  begin
    BrowsePathElement := IUnknown(Element) as _UABrowsePathElement;
    WriteLn(BrowsePathElement.ToString);
  end;

  // Example output:
  // StartingNodeId: ObjectsFolder
  // Elements:
  // /Data
  // /Static
  // /UserScalar

end;

// Attempts to parses an absolute  OPC-UA browse path and displays its starting node and elements.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in PHP on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-PHP .
// Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.

$BrowsePath = new COM("OpcLabs.EasyOpc.UA.Navigation.UABrowsePath");

$BrowsePathParser = new COM("OpcLabs.EasyOpc.UA.Navigation.Parsing.UABrowsePathParser");

$StringParsingError = $BrowsePathParser->TryParse("[ObjectsFolder]/Data/Static/UserScalar", $BrowsePath);

// Display results
if (!is_null($StringParsingError)) {
    printf("*** Error: %s\n", $StringParsingError);
    exit();
}

printf("StartingNodeId: %s\n", $BrowsePath->StartingNodeId);

printf("Elements:\n");

for ($i = 0; $i < $BrowsePath->Elements->Count; $i++)
{
    printf("%s\n", $BrowsePath->Elements[$i]);
}

// Example output:
// StartingNodeId: ObjectsFolder
// Elements:
// /Data
// /Static
// /UserScalar

REM Attempts to parses an absolute  OPC-UA browse path and displays its starting node and elements.
REM
REM Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
REM OPC client and subscriber examples in Visual Basic on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VB .
REM Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
REM a commercial license in order to use Online Forums, and we reply to every post.

Private Sub TryParse_Main_Command_Click()
    OutputText = ""
    
    Dim BrowsePathParser As New UABrowsePathParser

    Dim stringParsingError As stringParsingError
    Dim browsePath As Variant
    Set stringParsingError = BrowsePathParser.TryParse("[ObjectsFolder]/Data/Static/UserScalar", browsePath)
    
    ' Display results
    If Not stringParsingError Is Nothing Then
        OutputText = OutputText & "*** Error: " & stringParsingError & vbCrLf
        Exit Sub
    End If
    
    OutputText = OutputText & "StartingNodeId: " & browsePath.StartingNodeId & vbCrLf
    
    OutputText = OutputText & "Elements:" & vbCrLf
    Dim BrowsePathElement: For Each BrowsePathElement In browsePath.Elements
        OutputText = OutputText & BrowsePathElement & vbCrLf
    Next

    ' Example output:
    'StartingNodeId: ObjectsFolder
    'Elements:
    '/Data
    '/Static
    '/UserScalar
End Sub

Rem Attempts to parses an absolute  OPC-UA browse path and displays its starting node and elements.
Rem
Rem Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
Rem OPC client and subscriber examples in VBScript on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VBScript .
Rem Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
Rem a commercial license in order to use Online Forums, and we reply to every post.

Option Explicit

Dim BrowsePathParser: Set BrowsePathParser = CreateObject("OpcLabs.EasyOpc.UA.Navigation.Parsing.UABrowsePathParser")
Dim BrowsePath
Dim StringParsingError: Set StringParsingError = BrowsePathParser.TryParse("[ObjectsFolder]/Data/Static/UserScalar", BrowsePath)

' Display results
If Not (StringParsingError Is Nothing) Then
    WScript.Echo "*** Error: " & StringParsingError
    WScript.Quit
End If

WScript.Echo "StartingNodeId: " & BrowsePath.StartingNodeId

WScript.Echo "Elements:"
Dim BrowsePathElement: For Each BrowsePathElement In BrowsePath.Elements
    WScript.Echo BrowsePathElement
Next

Object Pascal
PHP
Visual Basic (VB 6.0)
VBScript

// Attempts to parse a relative OPC-UA browse path and displays its elements.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in Object Pascal (Delphi) on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-OP .
// Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.

class procedure TryParseRelative.Main;
var
  BrowsePathElement: _UABrowsePathElement;
  BrowsePathElements: _UABrowsePathElementCollection;
  BrowsePathParser: OpcLabs_EasyOpcUA_TLB._UABrowsePathParser;
  Count: Cardinal;
  Element: OleVariant;
  ElementEnumerator: IEnumVariant;
  StringParsingError: _StringParsingError;
begin
  BrowsePathElements := CoUABrowsePathElementCollection.Create;

  BrowsePathParser := CoUABrowsePathParser.Create;
  StringParsingError := BrowsePathParser.TryParseRelative('/Data.Dynamic.Scalar.CycleComplete', BrowsePathElements);

  // Display results
  if StringParsingError <> nil then
  begin
    WriteLn('*** Error: ', StringParsingError.ToString);
    Exit;
  end;

  ElementEnumerator := BrowsePathElements.GetEnumerator;
  while (ElementEnumerator.Next(1, Element, Count) = S_OK) do
  begin
    BrowsePathElement := IUnknown(Element) as _UABrowsePathElement;
    WriteLn(BrowsePathElement.ToString);
  end;

  // Example output:
  // /Data
  // .Dynamic
  // .Scalar
  // .CycleComplete

end;

// Attempts to parse a relative OPC-UA browse path and displays its elements.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in PHP on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-PHP .
// Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.

$BrowsePathElements = new COM("OpcLabs.EasyOpc.UA.Navigation.UABrowsePathElementCollection");

$BrowsePathParser = new COM("OpcLabs.EasyOpc.UA.Navigation.Parsing.UABrowsePathParser");

$StringParsingError = $BrowsePathParser->TryParseRelative("/Data.Dynamic.Scalar.CycleComplete", $BrowsePathElements);

// Display results
if (!is_null($StringParsingError)) {
    printf("*** Error: %s\n", $StringParsingError);
    exit();
}

printf("StartingNodeId: %s\n", $BrowsePath->StartingNodeId);

printf("Elements:\n");

for ($i = 0; $i < $BrowsePathElements->Count; $i++)
{
    printf("%s\n", $BrowsePathElements[$i]);
}

// Example output:
// /Data
// .Dynamic
// .Scalar
// .CycleComplete

REM Attempts to parse a relative OPC-UA browse path and displays its elements.
REM
REM Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
REM OPC client and subscriber examples in Visual Basic on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VB .
REM Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
REM a commercial license in order to use Online Forums, and we reply to every post.

Private Sub TryParseRelative_Main_Command_Click()
    OutputText = ""
    
    Dim BrowsePathElements As New UABrowsePathElementCollection
    
    Dim BrowsePathParser As New UABrowsePathParser

    Dim stringParsingError As stringParsingError
    Set stringParsingError = BrowsePathParser.TryParseRelative("/Data.Dynamic.Scalar.CycleComplete", BrowsePathElements)
    
    ' Display results
    If Not stringParsingError Is Nothing Then
        OutputText = OutputText & "*** Error: " & stringParsingError & vbCrLf
        Exit Sub
    End If
    
    Dim BrowsePathElement: For Each BrowsePathElement In BrowsePathElements
        OutputText = OutputText & BrowsePathElement & vbCrLf
    Next

    ' Example output:
    '/Data
    '.Dynamic
    '.Scalar
    '.CycleComplete
End Sub

Rem Attempts to parse a relative OPC-UA browse path and displays its elements.
Rem
Rem Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
Rem OPC client and subscriber examples in VBScript on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VBScript .
Rem Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
Rem a commercial license in order to use Online Forums, and we reply to every post.

Option Explicit

Dim BrowsePathElements: Set BrowsePathElements = CreateObject("OpcLabs.EasyOpc.UA.Navigation.UABrowsePathElementCollection")

Dim BrowsePathParser: Set BrowsePathParser = CreateObject("OpcLabs.EasyOpc.UA.Navigation.Parsing.UABrowsePathParser")
Dim StringParsingError: Set StringParsingError = BrowsePathParser.TryParseRelative("/Data.Dynamic.Scalar.CycleComplete", BrowsePathElements)

' Display results
If Not (StringParsingError Is Nothing) Then
    WScript.Echo "*** Error: " & StringParsingError
    WScript.Quit
End If

Dim BrowsePathElement: For Each BrowsePathElement In BrowsePathElements
    WScript.Echo BrowsePathElement
Next

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

Reference

_UABrowsePathParser Members
OpcLabs.EasyOpc.UA.Navigation.Parsing.ComTypes Namespace

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