Some fixed for not getting windows to focus/to front which were inspired by FEATURE-992. [skip ci]

GreenshotOfficePlugin/OfficeExport/ExcelExporter.cs

@@ -22,6 +22,7 @@ using System;
 using System.Collections.Generic;
 using System.Reflection;
 using System.Drawing;
+using GreenshotPlugin.Core;
 
 namespace Greenshot.Interop.Office {
 	public class ExcelExporter {
@@ -72,6 +73,11 @@ namespace Greenshot.Interop.Office {
 						}
 					}
 				}
+				int hWnd = excelApplication.Hwnd;
+				if (hWnd > 0)
+				{
+					WindowDetails.ToForeground(new IntPtr(hWnd));
+				}
 			}
 		}
 

GreenshotOfficePlugin/OfficeExport/WordExporter.cs

@@ -22,6 +22,7 @@ using System;
 using System.Collections.Generic;
 using GreenshotOfficePlugin;
 using Greenshot.IniFile;
+using GreenshotPlugin.Core;
 
 namespace Greenshot.Interop.Office {
 	public class WordExporter {
@@ -123,7 +124,15 @@ namespace Greenshot.Interop.Office {
 					// ignored
 				}
 				try {
-					wordDocument.Activate();
+					using (var activeWindow = wordDocument.ActiveWindow)
+					{
+						activeWindow.Activate();
+						int hWnd = activeWindow.Hwnd;
+						if (hWnd > 0)
+						{
+							WindowDetails.ToForeground(new IntPtr(hWnd));
+						}
+					}
 				}
 				catch
 				{
@@ -192,7 +201,15 @@ namespace Greenshot.Interop.Office {
 							// ignored
 						}
 						try {
-							wordDocument.ActiveWindow.Activate();
+							using (var activeWindow = wordDocument.ActiveWindow)
+							{
+								activeWindow.Activate();
+								int hWnd = activeWindow.Hwnd;
+								if (hWnd > 0)
+								{
+									WindowDetails.ToForeground(new IntPtr(hWnd));
+								}
+							}
 						}
 						catch
 						{

GreenshotOfficePlugin/OfficeInterop/ExcelInterop.cs

@@ -37,13 +37,21 @@ namespace Greenshot.Interop.Office {
 		string Version {
 			get;
 		}
+
+		/// <summary>
+		/// Returns an Integer indicating the top-level window handle of the Microsoft Excel window.
+		/// </summary>
+		int Hwnd
+		{
+			get;
+		}
 	}
 
 	// See: http://msdn.microsoft.com/en-us/library/microsoft.office.interop.excel.workbooks.aspx
 	public interface IWorkbooks : ICommon, ICollection {
 		IWorkbook Add(object template);
 		// Use index + 1!!
-		IWorkbook this[object Index] {
+		IWorkbook this[object index] {
 			get;
 		}
 	}
@@ -76,14 +84,14 @@ namespace Greenshot.Interop.Office {
 	}
 
 	// See: http://msdn.microsoft.com/en-us/library/microsoft.office.interop.excel.iworksheets_members.aspx
-	public interface IWorksheets : ICommon, ICollection {
+	public interface IWorksheets : ICollection {
 		// Use index + 1!!
-		IWorksheet this[object Index] {
+		IWorksheet this[object index] {
 			get;
 		}
 	}
 
-	public interface IPictures : ICommon, ICollection {
+	public interface IPictures : ICollection {
 		// Use index + 1!!
 		//IPicture this[object Index] { get; }
 		void Insert(string file);

GreenshotOfficePlugin/OfficeInterop/OutlookInterop.cs

@@ -289,7 +289,9 @@ namespace Greenshot.Interop.Office {
 		}
 	}
 
-	// See: http://msdn.microsoft.com/en-us/library/microsoft.office.interop.outlook.inspector_members.aspx
+	/// <summary>
+	/// See: http://msdn.microsoft.com/en-us/library/microsoft.office.interop.outlook.inspector_members.aspx
+	/// </summary>
 	public interface IInspector : ICommonExplorer {
 		IItem CurrentItem {
 			get;

GreenshotOfficePlugin/OfficeInterop/WordInterop.cs

@@ -60,6 +60,11 @@ namespace Greenshot.Interop.Office {
 		string Caption {
 			get;
 		}
+
+		/// <summary>
+		/// Returns an Integer (int in C#) that indicates the window handle of the specified window
+		/// </summary>
+		int Hwnd { get; }
 	}
 
 	/// <summary>