Extract snippets from remaining SpreadsheetML tutorials, extract "Packages and Document Parts" section, and fix multiple xmlns errors (#298)

Author: mikeebowen

docs/includes/spreadsheet/structure.md

@@ -22,7 +22,7 @@ code example.
 
 ```xml
     <?xml version="1.0" encoding="UTF-8" ?> 
-    <worksheet xmlns="https://schemas.openxmlformats.org/spreadsheetml/2006/main">
+    <worksheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main">
         <sheetData>
             <row r="1">
                 <c r="A1">

docs/presentation/structure-of-a-presentationml-document.md

@@ -650,7 +650,7 @@ The following XML code is the PresentationML that represents the relationship pa
 
 ```xml
     <?xml version="1.0" encoding="utf-8"?>
-    <Relationships xmlns="https://schemas.openxmlformats.org/package/2006/relationships">
+    <Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
       <Relationship Type="https://schemas.openxmlformats.org/officeDocument/2006/relationships/slide"
                     Target="/ppt/slides/slide.xml"
                     Id="rId2" />

docs/spreadsheet/how-to-add-custom-ui-to-a-spreadsheet-document.md

@@ -11,7 +11,7 @@ ms.suite: office
 ms.author: o365devx
 author: o365devx
 ms.topic: conceptual
-ms.date: 11/01/2017
+ms.date: 01/10/2024
 ms.localizationpriority: high
 ---
 
@@ -24,22 +24,15 @@ this task.
 
 ## Creating Custom UI
 
-Before using the Open XML SDK to create a ribbon customization in an Excel workbook, you must first create the customization content. Describing the XML required to create a ribbon customization is beyond the scope of this topic. In addition, you will find it far easier to use the Ribbon Designer in Visual Studio 2010 to create the customization for you. For more information about customizing the ribbon by using the Visual Studio Ribbon Designer, see [Ribbon Designer](https://msdn.microsoft.com/library/26617206-f4da-416f-a18a-d817b2d4872d(Office.15).aspx) and [Walkthrough: Creating a Custom Tab by Using the Ribbon Designer](https://msdn.microsoft.com/library/312865e6-950f-46ab-88de-fe7eb8036bfe(Office.15).aspx).
-For the purposes of this demonstration, you will need an XML file that contains a customization, and the following code provides a simple customization (or you can create your own by using the Visual Studio Ribbon Designer, and then right-click to export the customization to an XML file). Copy the following content into a text file that is named AddCustomUI.xml for use as part of this example. This XML content describes a ribbon customization that includes a button labeled "Click Me!" in a group named Group1 on the **Add-Ins** tab in Excel. When you click the button, it attempts to run a macro named **SampleMacro** in the host workbook.
-
-```xml
-    <customUI xmlns="https://schemas.microsoft.com/office/2006/01/customui">
-        <ribbon>
-            <tabs>
-                <tab idMso="TabAddIns">
-                    <group id="Group1" label="Group1">
-                        <button id="Button1" label="Click Me!" showImage="false" onAction="SampleMacro"/>
-                    </group>
-                </tab>
-            </tabs>
-        </ribbon>
-    </customUI>
-```
+Before using the Open XML SDK to create a ribbon customization in an Excel workbook, you must first create the customization content. Describing the XML required to create a ribbon customization is beyond the scope of this topic. In addition, you will find it far easier to use the Ribbon Designer in Visual Studio to create the customization for you. For more information about customizing the ribbon by using the Visual Studio Ribbon Designer, see [Ribbon Designer](https://msdn.microsoft.com/library/26617206-f4da-416f-a18a-d817b2d4872d(Office.15).aspx) and [Walkthrough: Creating a Custom Tab by Using the Ribbon Designer](https://msdn.microsoft.com/library/312865e6-950f-46ab-88de-fe7eb8036bfe(Office.15).aspx).
+For the purposes of this demonstration, you will need an XML file that contains a customization, and the following code provides a simple customization (or you can create your own by using the Visual Studio Ribbon Designer, and then right-click to export the customization to an XML file). The samples below are the xml strings used in this example. This XML content describes a ribbon customization that includes a button labeled "Click Me!" in a group named Group1 on the **Add-Ins** tab in Excel. When you click the button, it attempts to run a macro named **SampleMacro** in the host workbook.
+
+### [C#](#tab/cs-xml)
+[!code-csharp[](../../samples/spreadsheet/add_custom_ui/cs/Program.cs#snippet4)]
+### [Visual Basic](#tab/vb-xml)
+[!code-vb[](../../samples/spreadsheet/add_custom_ui/vb/Program.vb#snippet4)]
+***
+
 
 ## Create the Macro
 
@@ -69,60 +62,14 @@ The **AddCustomUI** method accepts two parameters:
 
 - customUIContent*—A string that contains the custom content (that is, the XML markup that describes the customization).
 
-The following code shows the two parameters.
-
-### [C#](#tab/cs-0)
-```csharp
-    static public void AddCustomUI(string fileName, string customUIContent)
-```
-
-### [Visual Basic](#tab/vb-0)
-```vb
-    Public Sub XLAddCustomUI(ByVal fileName As String,
-                                 ByVal customUIContent As String)
-```
-***
-
-
-## Call the AddCustomUI Method
-
-The method modifies the ribbon in an Excel workbook. To call the method, pass the file name of the workbook to modify, and a string that contains the customization XML, as shown in the following example code.
-
-### [C#](#tab/cs-1)
-```csharp
-    const string SAMPLEXML = "AddCustomUI.xml";
-    const string DEMOFILE = "AddCustomUI.xlsm";
-
-    string content = System.IO.File.OpenText(SAMPLEXML).ReadToEnd();
-    AddCustomUI(DEMOFILE, content);
-```
-
-### [Visual Basic](#tab/vb-1)
-```vb
-    Const SAMPLEXML As String = "AddCustomUI.xml"
-    Const DEMOFILE As String = "AddCustomUI.xlsm"
-
-    Dim content As String = System.IO.File.OpenText(SAMPLEXML).ReadToEnd()
-    AddCustomUI(DEMOFILE, content)
-```
-***
-
-
 ## Interact with the Workbook
 
 The sample method, **AddCustomUI**, starts by opening the requested workbook in read/write mode, as shown in the following code.
 
 ### [C#](#tab/cs-2)
-```csharp
-    using (SpreadsheetDocument document = 
-        SpreadsheetDocument.Open(fileName, true))
-```
-
+[!code-csharp[](../../samples/spreadsheet/add_custom_ui/cs/Program.cs#snippet1)]
 ### [Visual Basic](#tab/vb-2)
-```vb
-    Using document As SpreadsheetDocument =
-        SpreadsheetDocument.Open(fileName, True)
-```
+[!code-vb[](../../samples/spreadsheet/add_custom_ui/vb/Program.vb#snippet1)]
 ***
 
 
@@ -131,25 +78,9 @@ The sample method, **AddCustomUI**, starts by opening the requested workbook in
 Next, as shown in the following code, the sample method attempts to retrieve a reference to the single ribbon extensibility part. If the part does not yet exist, the code creates it and stores a reference to the new part.
 
 ### [C#](#tab/cs-3)
-```csharp
-    // You can have only a single ribbon extensibility part.
-    // If the part doesn't exist, create it.
-    var part = document.RibbonExtensibilityPart;
-    if (part == null)
-    {
-        part = document.AddRibbonExtensibilityPart();
-    }
-```
-
+[!code-csharp[](../../samples/spreadsheet/add_custom_ui/cs/Program.cs#snippet2)]
 ### [Visual Basic](#tab/vb-3)
-```vb
-    ' You can have only a single ribbon extensibility part.
-    ' If the part doesn't exist, add it.
-    Dim part = document.RibbonExtensibilityPart
-    If part Is Nothing Then
-        part = document.AddRibbonExtensibilityPart
-    End If
-```
+[!code-vb[](../../samples/spreadsheet/add_custom_ui/vb/Program.vb#snippet2)]
 ***
 
 
@@ -158,31 +89,24 @@ Next, as shown in the following code, the sample method attempts to retrieve a r
 Given a reference to the ribbon extensibility part, the following code finishes by setting the part's **CustomUI** property to a new [CustomUI](https://msdn.microsoft.com/library/office/documentformat.openxml.office.customui.customui.aspx) object that contains the supplied customization. Once the customization is in place, the code saves the custom UI.
 
 ### [C#](#tab/cs-4)
-```csharp
-    part.CustomUI = new CustomUI(customUIContent);
-    part.CustomUI.Save();
-```
-
+[!code-csharp[](../../samples/spreadsheet/add_custom_ui/cs/Program.cs#snippet3)]
 ### [Visual Basic](#tab/vb-4)
-```vb
-    part.CustomUI = New CustomUI(customUIContent)
-    part.CustomUI.Save()
-```
+[!code-vb[](../../samples/spreadsheet/add_custom_ui/vb/Program.vb#snippet3)]
 ***
 
 
 ## Sample Code
 
-The following is the complete **AddCustomUI** code sample in C\# and Visual Basic.
+The following is the complete **AddCustomUI** code sample in C\# and Visual Basic. The first argument passed to the **AddCustomUI** should be the absolute
+path to the AddCustomUI.xlsm file created from the instructions above.
 
 ### [C#](#tab/cs)
-[!code-csharp[](../../samples/spreadsheet/add_custom_ui/cs/Program.cs)]
+[!code-csharp[](../../samples/spreadsheet/add_custom_ui/cs/Program.cs#snippet0)]
 
 ### [Visual Basic](#tab/vb)
-[!code-vb[](../../samples/spreadsheet/add_custom_ui/vb/Program.vb)]
+[!code-vb[](../../samples/spreadsheet/add_custom_ui/vb/Program.vb#snippet0)]
 
 ## See also
 
 - [Open XML SDK class library reference](/office/open-xml/open-xml-sdk)
-- [Ribbon Designer](https://msdn.microsoft.com/library/26617206-f4da-416f-a18a-d817b2d4872d(Office.15).aspx)
-- [Walkthrough: Creating a Custom Tab by Using the Ribbon Designer](https://msdn.microsoft.com/library/312865e6-950f-46ab-88de-fe7eb8036bfe(Office.15).aspx)
+