More Office-Code cleanup, should use a bit less resources and maybe be more stable. (needs testing)

GreenshotOfficePlugin/OfficeExport/ExcelExporter.cs

@@ -32,15 +32,24 @@ namespace Greenshot.Interop.Office {
 	public class ExcelExporter {
 		private static readonly log4net.ILog LOG = log4net.LogManager.GetLogger(typeof(ExcelExporter));
 		private static readonly OfficeConfiguration officeConfiguration = IniConfig.GetIniSection<OfficeConfiguration>();
+		private static Version excelVersion;
 
+		/// <summary>
+		/// Get all currently opened workbooks
+		/// </summary>
+		/// <returns>List<string> with names of the workbooks</returns>
 		public static List<string> GetWorkbooks() {
 			List<string> currentWorkbooks = new List<string>();
-			using (IExcelApplication excelApplication = COMWrapper.GetInstance<IExcelApplication>()) {
-				if (excelApplication != null) {
-					for (int i = 1; i <= excelApplication.Workbooks.Count; i++) {
-						IWorkbook workbook = excelApplication.Workbooks[i];
-						if (workbook != null) {
-							currentWorkbooks.Add(workbook.Name);
+			using (IExcelApplication excelApplication = GetExcelApplication()) {
+				if (excelApplication == null) {
+					return currentWorkbooks;
+				}
+				using (IWorkbooks workbooks = excelApplication.Workbooks) {
+					for (int i = 1; i <= workbooks.Count; i++) {
+						using (IWorkbook workbook = workbooks[i]) {
+							if (workbook != null) {
+								currentWorkbooks.Add(workbook.Name);
+							}
 						}
 					}
 				}
@@ -54,44 +63,103 @@ namespace Greenshot.Interop.Office {
 		/// <param name="workbookName"></param>
 		/// <param name="tmpFile"></param>
 		public static void InsertIntoExistingWorkbook(string workbookName, string tmpFile, Size imageSize) {
-			using (IExcelApplication excelApplication = COMWrapper.GetInstance<IExcelApplication>()) {
-				if (excelApplication != null) {
-					for (int i = 1; i <= excelApplication.Workbooks.Count; i++) {
-						IWorkbook workbook = excelApplication.Workbooks[i];
-						if (workbook != null && workbook.Name.StartsWith(workbookName)) {
-							InsertIntoExistingWorkbook(workbook, tmpFile, imageSize);
+			using (IExcelApplication excelApplication = GetExcelApplication()) {
+				if (excelApplication == null) {
+					return;
+				}
+				using (IWorkbooks workbooks = excelApplication.Workbooks) {
+					for (int i = 1; i <= workbooks.Count; i++) {
+						using (IWorkbook workbook = workbooks[i]) {
+							if (workbook != null && workbook.Name.StartsWith(workbookName)) {
+								InsertIntoExistingWorkbook(workbook, tmpFile, imageSize);
+							}
 						}
 					}
 				}
 			}
 		}
 
+		/// <summary>
+		/// Insert a file into an already created workbook
+		/// </summary>
+		/// <param name="workbook"></param>
+		/// <param name="tmpFile"></param>
+		/// <param name="imageSize"></param>
 		private static void InsertIntoExistingWorkbook(IWorkbook workbook, string tmpFile, Size imageSize) {
 			IWorksheet workSheet = workbook.ActiveSheet;
-			if (workSheet != null) {
-				if (workSheet.Shapes != null) {
-					IShape shape = workSheet.Shapes.AddPicture(tmpFile, MsoTriState.msoFalse, MsoTriState.msoTrue, 0, 0, imageSize.Width, imageSize.Height);
-					if (shape != null) {
-						shape.Top = 40;
-						shape.Left = 40;
-						shape.LockAspectRatio = MsoTriState.msoTrue;
-						shape.ScaleHeight(1, MsoTriState.msoTrue, MsoScaleFrom.msoScaleFromTopLeft);
-						shape.ScaleWidth(1, MsoTriState.msoTrue, MsoScaleFrom.msoScaleFromTopLeft);
+			if (workSheet == null) {
+				return;
+			}
+			using (IShapes shapes = workSheet.Shapes) {
+				if (shapes != null) {
+					using (IShape shape = shapes.AddPicture(tmpFile, MsoTriState.msoFalse, MsoTriState.msoTrue, 0, 0, imageSize.Width, imageSize.Height)) {
+						if (shape != null) {
+							shape.Top = 40;
+							shape.Left = 40;
+							shape.LockAspectRatio = MsoTriState.msoTrue;
+							shape.ScaleHeight(1, MsoTriState.msoTrue, MsoScaleFrom.msoScaleFromTopLeft);
+							shape.ScaleWidth(1, MsoTriState.msoTrue, MsoScaleFrom.msoScaleFromTopLeft);
+						}
 					}
 				}
 			}
 		}
 
+		/// <summary>
+		/// Add an image-file to a newly created workbook
+		/// </summary>
+		/// <param name="tmpFile"></param>
+		/// <param name="imageSize"></param>
 		public static void InsertIntoNewWorkbook(string tmpFile, Size imageSize) {
-			using (IExcelApplication excelApplication = COMWrapper.GetOrCreateInstance<IExcelApplication>()) {
+			using (IExcelApplication excelApplication = GetOrCreateExcelApplication()) {
 				if (excelApplication != null) {
 					excelApplication.Visible = true;
 					object template = Missing.Value;
-					IWorkbook workbook = excelApplication.Workbooks.Add(template);
-					InsertIntoExistingWorkbook(workbook, tmpFile, imageSize);
+					using (IWorkbooks workbooks = excelApplication.Workbooks) {
+						IWorkbook workbook = workbooks.Add(template);
+						InsertIntoExistingWorkbook(workbook, tmpFile, imageSize);
+					}
 				}
 			}
 		}
-	}
 
+
+		/// <summary>
+		/// Call this to get the running Excel application, returns null if there isn't any.
+		/// </summary>
+		/// <returns>IExcelApplication or null</returns>
+		private static IExcelApplication GetExcelApplication() {
+			IExcelApplication excelApplication = COMWrapper.GetInstance<IExcelApplication>();
+			InitializeVariables(excelApplication);
+			return excelApplication;
+		}
+
+		/// <summary>
+		/// Call this to get the running Excel application, or create a new instance
+		/// </summary>
+		/// <returns>IExcelApplication</returns>
+		private static IExcelApplication GetOrCreateExcelApplication() {
+			IExcelApplication excelApplication = COMWrapper.GetOrCreateInstance<IExcelApplication>();
+			InitializeVariables(excelApplication);
+			return excelApplication;
+		}
+
+		/// <summary>
+		/// Initialize static outlook variables like version and currentuser
+		/// </summary>
+		/// <param name="excelApplication"></param>
+		private static void InitializeVariables(IExcelApplication excelApplication) {
+			if (excelApplication == null || excelVersion != null) {
+				return;
+			}
+			try {
+				excelVersion = new Version(excelApplication.Version);
+				LOG.InfoFormat("Using Excel {0}", excelVersion);
+			} catch (Exception exVersion) {
+				LOG.Error(exVersion);
+				LOG.Warn("Assuming Excel version 1997.");
+				excelVersion = new Version((int)OfficeVersion.OFFICE_97, 0, 0, 0);
+			}
+		}
+	}
 }

GreenshotOfficePlugin/OfficeExport/OutlookEmailExporter.cs

@@ -44,10 +44,6 @@ namespace Greenshot.Interop.Office {
 		private static readonly string SIGNATURE_PATH = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), @"Microsoft\Signatures");
 		private static Version outlookVersion = null;
 		private static string currentUser = null;
-		private const int OUTLOOK_2003 = 11;
-		private const int OUTLOOK_2007 = 12;
-		private const int OUTLOOK_2010 = 14;
-		private const int OUTLOOK_2013 = 15;
 
 		// The signature key can be found at:
 		// HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\<DefaultProfile>\9375CFF0413111d3B88A00104B2A6676\<xxxx> [New Signature]
@@ -68,7 +64,7 @@ namespace Greenshot.Interop.Office {
 						return null;
 					}
 
-					if (outlookVersion.Major >= OUTLOOK_2013) {
+					if (outlookVersion.Major >= (int)OfficeVersion.OFFICE_2013) {
 						// Check inline "panel" for Outlook 2013
 						using (var activeExplorer = outlookApplication.ActiveExplorer()) {
 							if (activeExplorer != null) {
@@ -120,7 +116,7 @@ namespace Greenshot.Interop.Office {
 						if (!mailItem.Sent) {
 							return true;
 						}
-					} else if (outlookVersion.Major >= OUTLOOK_2010 && conf.OutlookAllowExportInMeetings && OlObjectClass.olAppointment.Equals(currentItemClass)) {
+					} else if (outlookVersion.Major >= (int)OfficeVersion.OFFICE_2010 && conf.OutlookAllowExportInMeetings && OlObjectClass.olAppointment.Equals(currentItemClass)) {
 						//AppointmentItem appointmentItem = COMWrapper.Cast<AppointmentItem>(currentItem);
 						AppointmentItem appointmentItem = (AppointmentItem)currentItem;
 						if (string.IsNullOrEmpty(appointmentItem.Organizer) || (currentUser != null && currentUser.Equals(appointmentItem.Organizer))) {
@@ -149,7 +145,7 @@ namespace Greenshot.Interop.Office {
 				if (outlookApplication == null) {
 					return false;
 				}
-				if (outlookVersion.Major >= OUTLOOK_2013) {
+				if (outlookVersion.Major >= (int)OfficeVersion.OFFICE_2013) {
 					// Check inline "panel" for Outlook 2013
 					using (var activeExplorer = outlookApplication.ActiveExplorer()) {
 						if (activeExplorer == null) {
@@ -271,7 +267,7 @@ namespace Greenshot.Interop.Office {
 				LOG.InfoFormat("Item '{0}' has format: {1}", mailItem.Subject, mailItem.BodyFormat);
 
 				string contentID;
-				if (outlookVersion.Major >= OUTLOOK_2007) {
+				if (outlookVersion.Major >= (int)OfficeVersion.OFFICE_2007) {
 					contentID = Guid.NewGuid().ToString();
 				} else {
 					LOG.Info("Older Outlook (<2007) found, using filename as contentid.");
@@ -315,7 +311,7 @@ namespace Greenshot.Interop.Office {
 
 				// Create the attachment (if inlined the attachment isn't visible as attachment!)
 				using (IAttachment attachment = mailItem.Attachments.Add(tmpFile, OlAttachmentType.olByValue, inlinePossible ? 0 : 1, attachmentName)) {
-					if (outlookVersion.Major >= OUTLOOK_2007) {
+					if (outlookVersion.Major >= (int)OfficeVersion.OFFICE_2007) {
 						// Add the content id to the attachment, this only works for Outlook >= 2007
 						try {
 							IPropertyAccessor propertyAccessor = attachment.PropertyAccessor;
@@ -386,7 +382,7 @@ namespace Greenshot.Interop.Office {
 						// Create the attachment (and dispose the COM object after using)
 						using (IAttachment attachment = newMail.Attachments.Add(tmpFile, OlAttachmentType.olByValue, 0, attachmentName)) {
 							// add content ID to the attachment
-							if (outlookVersion.Major >= OUTLOOK_2007) {
+							if (outlookVersion.Major >= (int)OfficeVersion.OFFICE_2007) {
 								try {
 									contentID = Guid.NewGuid().ToString();
 									IPropertyAccessor propertyAccessor = attachment.PropertyAccessor;
@@ -526,11 +522,11 @@ namespace Greenshot.Interop.Office {
 				LOG.InfoFormat("Using Outlook {0}", outlookVersion);
 			} catch (Exception exVersion) {
 				LOG.Error(exVersion);
-				LOG.Warn("Assuming outlook version 1.");
-				outlookVersion = new Version(1, 1, 1, 1);
+				LOG.Warn("Assuming outlook version 1997.");
+				outlookVersion = new Version((int)OfficeVersion.OFFICE_97, 0, 0, 0);
 			}
 			// Preventing retrieval of currentUser if Outlook is older than 2007
-			if (outlookVersion.Major >= OUTLOOK_2007) {
+			if (outlookVersion.Major >= (int)OfficeVersion.OFFICE_2007) {
 				try {
 					INameSpace mapiNamespace = outlookApplication.GetNameSpace("MAPI");
 					currentUser = mapiNamespace.CurrentUser.Name;

GreenshotOfficePlugin/OfficeExport/PowerpointExporter.cs

@@ -28,14 +28,12 @@ using Greenshot.Interop;
 namespace Greenshot.Interop.Office {
 	public class PowerpointExporter {
 		private static readonly log4net.ILog LOG = log4net.LogManager.GetLogger(typeof(PowerpointExporter));
-		private static string version = null;
+		private static Version powerpointVersion;
 
 		public static bool isAfter2003() {
-			if (version != null) {
-				return !version.StartsWith("11");
-			}
-			return false;
+			return powerpointVersion.Major > (int)OfficeVersion.OFFICE_2003;
 		}
+
 		/// <summary>
 		/// Get the captions of all the open powerpoint presentations
 		/// </summary>
@@ -43,13 +41,11 @@ namespace Greenshot.Interop.Office {
 		public static List<string> GetPowerpointPresentations() {
 			List<string> foundPresentations = new System.Collections.Generic.List<string>();
 			try {
-				using (IPowerpointApplication powerpointApplication = COMWrapper.GetInstance<IPowerpointApplication>()) {
+				using (IPowerpointApplication powerpointApplication = GetPowerpointApplication()) {
 					if (powerpointApplication == null) {
 						return foundPresentations;
 					}
-					if (version == null) {
-						version = powerpointApplication.Version;
-					}
+
 					using (IPresentations presentations = powerpointApplication.Presentations) {
 						LOG.DebugFormat("Open Presentations: {0}", presentations.Count);
 						for (int i = 1; i <= presentations.Count; i++) {
@@ -86,7 +82,7 @@ namespace Greenshot.Interop.Office {
 		/// <param name="title">A string with the image title</param>
 		/// <returns></returns>
 		public static bool ExportToPresentation(string presentationName, string tmpFile, Size imageSize, string title) {
-			using (IPowerpointApplication powerpointApplication = COMWrapper.GetInstance<IPowerpointApplication>()) {
+			using (IPowerpointApplication powerpointApplication = GetPowerpointApplication()) {
 				if (powerpointApplication == null) {
 					return false;
 				}
@@ -221,7 +217,7 @@ namespace Greenshot.Interop.Office {
 		/// <returns></returns>
 		public static bool InsertIntoNewPresentation(string tmpFile, Size imageSize, string title) {
 			bool isPictureAdded = false;
-			using (IPowerpointApplication powerpointApplication = COMWrapper.GetOrCreateInstance<IPowerpointApplication>()) {
+			using (IPowerpointApplication powerpointApplication = GetOrCreatePowerpointApplication()) {
 				if (powerpointApplication == null) {
 					return isPictureAdded;
 				}
@@ -239,5 +235,44 @@ namespace Greenshot.Interop.Office {
 			}
 			return isPictureAdded;
 		}
+
+		/// <summary>
+		/// Call this to get the running powerpoint application, returns null if there isn't any.
+		/// </summary>
+		/// <returns>IPowerpointApplication or null</returns>
+		private static IPowerpointApplication GetPowerpointApplication() {
+			IPowerpointApplication powerpointApplication = COMWrapper.GetInstance<IPowerpointApplication>();
+			InitializeVariables(powerpointApplication);
+			return powerpointApplication;
+		}
+
+		/// <summary>
+		/// Call this to get the running powerpoint application, or create a new instance
+		/// </summary>
+		/// <returns>IPowerpointApplication</returns>
+		private static IPowerpointApplication GetOrCreatePowerpointApplication() {
+			IPowerpointApplication powerpointApplication = COMWrapper.GetOrCreateInstance<IPowerpointApplication>();
+			InitializeVariables(powerpointApplication);
+			return powerpointApplication;
+		}
+
+		/// <summary>
+		/// Initialize static outlook variables like version and currentuser
+		/// </summary>
+		/// <param name="powerpointApplication">IPowerpointApplication</param>
+		private static void InitializeVariables(IPowerpointApplication powerpointApplication) {
+			if (powerpointApplication == null || powerpointVersion != null) {
+				return;
+			}
+			try {
+				powerpointVersion = new Version(powerpointApplication.Version);
+				LOG.InfoFormat("Using Powerpoint {0}", powerpointVersion);
+			} catch (Exception exVersion) {
+				LOG.Error(exVersion);
+				LOG.Warn("Assuming Powerpoint version 1997.");
+				powerpointVersion = new Version((int)OfficeVersion.OFFICE_97, 0, 0, 0);
+			}
+		}
+
 	}
 }

GreenshotOfficePlugin/OfficeExport/WordExporter.cs

@@ -29,15 +29,17 @@ using Greenshot.IniFile;
 namespace Greenshot.Interop.Office {
 	public class WordExporter {
 		private static readonly log4net.ILog LOG = log4net.LogManager.GetLogger(typeof(WordExporter));
-		private static string version = null;
+		private static Version wordVersion = null;
 		private static OfficeConfiguration config = IniConfig.GetIniSection<OfficeConfiguration>();
 
-		public static bool isAfter2003() {
-			if (version != null) {
-				return !version.StartsWith("11");
-			}
-			return false;
+		/// <summary>
+		/// Check if the used version is higher than Office 2003
+		/// </summary>
+		/// <returns></returns>
+		private static bool isAfter2003() {
+			return wordVersion.Major > (int)OfficeVersion.OFFICE_2003;
 		}
+
 		/// <summary>
 		/// Insert the bitmap stored under the tempfile path into the word document with the supplied caption
 		/// </summary>
@@ -45,12 +47,17 @@ namespace Greenshot.Interop.Office {
 		/// <param name="tmpFile"></param>
 		/// <returns></returns>
 		public static bool InsertIntoExistingDocument(string wordCaption, string tmpFile) {
-			using (IWordApplication wordApplication = COMWrapper.GetInstance<IWordApplication>()) {
-				if (wordApplication != null) {
-					for (int i = 1; i <= wordApplication.Documents.Count; i++) {
-						using (IWordDocument wordDocument = wordApplication.Documents.item(i)) {
-							if (wordDocument.ActiveWindow.Caption.StartsWith(wordCaption)) {
-								return InsertIntoExistingDocument(wordApplication, wordDocument, tmpFile, null, null);
+			using (IWordApplication wordApplication = GetWordApplication()) {
+				if (wordApplication == null) {
+					return false;
+				}
+				using (IDocuments documents = wordApplication.Documents) {
+					for (int i = 1; i <= documents.Count; i++) {
+						using (IWordDocument wordDocument = documents.item(i)) {
+							using (IWordWindow activeWindow = wordDocument.ActiveWindow) {
+								if (activeWindow.Caption.StartsWith(wordCaption)) {
+									return InsertIntoExistingDocument(wordApplication, wordDocument, tmpFile, null, null);
+								}
 							}
 						}
 					}
@@ -75,23 +82,36 @@ namespace Greenshot.Interop.Office {
 				wordDocument.Activate();
 			} catch {
 			}
-			if (wordApplication.Selection != null) {
+			using (ISelection selection = wordApplication.Selection) {
+				if (selection == null) {
+					LOG.InfoFormat("No selection to insert {0} into found.", tmpFile);
+					return false;
+				}
 				// Add Picture
-				using (IInlineShape shape = AddPictureToSelection(wordApplication.Selection, tmpFile)) {
+				using (IInlineShape shape = AddPictureToSelection(selection, tmpFile)) {
 					if (!string.IsNullOrEmpty(address)) {
 						object screentip = Type.Missing;
 						if (!string.IsNullOrEmpty(tooltip)) {
 							screentip = tooltip;
 						}
 						try {
-							wordDocument.Hyperlinks.Add(shape, screentip, Type.Missing, screentip, Type.Missing, Type.Missing);
+							using (IHyperlinks hyperlinks = wordDocument.Hyperlinks) {
+								hyperlinks.Add(shape, screentip, Type.Missing, screentip, Type.Missing, Type.Missing);
+							}
 						} catch (Exception e) {
 							LOG.WarnFormat("Couldn't add hyperlink for image: {0}", e.Message);
 						}
 					}
 				}
 				try {
-					wordDocument.ActiveWindow.ActivePane.View.Zoom.Percentage = 100;
+					using (IWordWindow activeWindow = wordDocument.ActiveWindow) {
+						activeWindow.Activate();
+						using (IPane activePane = activeWindow.ActivePane) {
+							using (IWordView view = activePane.View) {
+								view.Zoom.Percentage = 100;
+							}
+						}
+					}
 				} catch (Exception e) {
 					if (e.InnerException != null) {
 						LOG.WarnFormat("Couldn't set zoom to 100, error: {0}", e.InnerException.Message);
@@ -101,64 +121,74 @@ namespace Greenshot.Interop.Office {
 				}
 				try {
 					wordApplication.Activate();
-				} catch {}
+				} catch {
+				}
 				try {
 					wordDocument.Activate();
-				} catch {}
-				try {
-					wordDocument.ActiveWindow.Activate();
-				} catch {}
+				} catch {
+				}
 				return true;
 			}
-			return false;
 		}
 
+		/// <summary>
+		/// Helper method to add the file as image to the selection
+		/// </summary>
+		/// <param name="selection"></param>
+		/// <param name="tmpFile"></param>
+		/// <returns></returns>
 		private static IInlineShape AddPictureToSelection(ISelection selection, string tmpFile) {
-			IInlineShape shape = selection.InlineShapes.AddPicture(tmpFile, false, true, Type.Missing);
-			// Lock aspect ratio
-			if (config.WordLockAspectRatio) {
-				shape.LockAspectRatio = MsoTriState.msoTrue;
+			using (IInlineShapes shapes = selection.InlineShapes) {
+				IInlineShape shape = shapes.AddPicture(tmpFile, false, true, Type.Missing);
+				// Lock aspect ratio
+				if (config.WordLockAspectRatio) {
+					shape.LockAspectRatio = MsoTriState.msoTrue;
+				}
+				selection.InsertAfter("\r\n");
+				return shape;
 			}
-			selection.InsertAfter("\r\n");
-			return shape;
 		}
 
 		public static void InsertIntoNewDocument(string tmpFile, string address, string tooltip) {
-			using (IWordApplication wordApplication = COMWrapper.GetOrCreateInstance<IWordApplication>()) {
-				if (wordApplication != null) {
-					wordApplication.Visible = true;
-					wordApplication.Activate();
-					// Create new Document
-					object template = string.Empty;
-					object newTemplate = false;
-					object documentType = 0;
-					object documentVisible = true;
-					IWordDocument wordDocument = wordApplication.Documents.Add(ref template, ref newTemplate, ref documentType, ref documentVisible);
-					// Add Picture
-					using (IInlineShape shape = AddPictureToSelection(wordApplication.Selection, tmpFile)) {
-						if (!string.IsNullOrEmpty(address)) {
-							object screentip = Type.Missing;
-							if (!string.IsNullOrEmpty(tooltip)) {
-								screentip = tooltip;
-							}
-							try {
-								wordDocument.Hyperlinks.Add(shape, screentip, Type.Missing, screentip, Type.Missing, Type.Missing);
-							} catch (Exception e) {
-								LOG.WarnFormat("Couldn't add hyperlink for image: {0}", e.Message);
+			using (IWordApplication wordApplication = GetOrCreateWordApplication()) {
+				if (wordApplication == null) {
+					return;
+				}
+				wordApplication.Visible = true;
+				wordApplication.Activate();
+				// Create new Document
+				object template = string.Empty;
+				object newTemplate = false;
+				object documentType = 0;
+				object documentVisible = true;
+				using (IDocuments documents = wordApplication.Documents) {
+					using (IWordDocument wordDocument = documents.Add(ref template, ref newTemplate, ref documentType, ref documentVisible)) {
+						using (ISelection selection = wordApplication.Selection) {
+							// Add Picture
+							using (IInlineShape shape = AddPictureToSelection(selection, tmpFile)) {
+								if (!string.IsNullOrEmpty(address)) {
+									object screentip = Type.Missing;
+									if (!string.IsNullOrEmpty(tooltip)) {
+										screentip = tooltip;
+									}
+									try {
+										using (IHyperlinks hyperlinks = wordDocument.Hyperlinks) {
+											hyperlinks.Add(shape, screentip, Type.Missing, screentip, Type.Missing, Type.Missing);
+										}
+									} catch (Exception e) {
+										LOG.WarnFormat("Couldn't add hyperlink for image: {0}", e.Message);
+									}
+								}
 							}
 						}
-					}
-					try {
-						wordApplication.Activate();
-					} catch {
-					}
-					try {
-						wordDocument.Activate();
-					} catch {
-					}
-					try {
-						wordDocument.ActiveWindow.Activate();
-					} catch {
+						try {
+							wordDocument.Activate();
+						} catch {
+						}
+						try {
+							wordDocument.ActiveWindow.Activate();
+						} catch {
+						}
 					}
 				}
 			}
@@ -169,31 +199,72 @@ namespace Greenshot.Interop.Office {
 		/// </summary>
 		/// <returns></returns>
 		public static List<string> GetWordDocuments() {
-			List<string> documents = new List<string>();
+			List<string> openDocuments = new List<string>();
 			try {
-				using (IWordApplication wordApplication = COMWrapper.GetInstance<IWordApplication>()) {
-					if (wordApplication != null) {
-						if (version == null) {
-							version = wordApplication.Version;
-						}
-						for (int i = 1; i <= wordApplication.Documents.Count; i++) {
-							IWordDocument document = wordApplication.Documents.item(i);
-							if (document.ReadOnly) {
-								continue;
-							}
-							if (isAfter2003()) {
-								if (document.Final) {
+				using (IWordApplication wordApplication = GetWordApplication()) {
+					if (wordApplication == null) {
+						return openDocuments;
+					}
+					using (IDocuments documents = wordApplication.Documents) {
+						for (int i = 1; i <= documents.Count; i++) {
+							using (IWordDocument document = documents.item(i)) {
+								if (document.ReadOnly) {
 									continue;
 								}
+								if (isAfter2003()) {
+									if (document.Final) {
+										continue;
+									}
+								}
+								using (IWordWindow activeWindow = document.ActiveWindow) {
+									openDocuments.Add(activeWindow.Caption);
+								}
 							}
-							documents.Add(document.ActiveWindow.Caption);
 						}
 					}
 				}
 			} catch (Exception ex) {
 				LOG.Warn("Problem retrieving word destinations, ignoring: ", ex);
 			}
-			return documents;
+			return openDocuments;
+		}
+
+		/// <summary>
+		/// Call this to get the running outlook application, returns null if there isn't any.
+		/// </summary>
+		/// <returns>IWordApplication or null</returns>
+		private static IWordApplication GetWordApplication() {
+			IWordApplication wordApplication = COMWrapper.GetInstance<IWordApplication>();
+			InitializeVariables(wordApplication);
+			return wordApplication;
+		}
+
+		/// <summary>
+		/// Call this to get the running word application, or create a new instance
+		/// </summary>
+		/// <returns>IWordApplication</returns>
+		private static IWordApplication GetOrCreateWordApplication() {
+			IWordApplication wordApplication = COMWrapper.GetOrCreateInstance<IWordApplication>();
+			InitializeVariables(wordApplication);
+			return wordApplication;
+		}
+
+		/// <summary>
+		/// Initialize static outlook variables like version and currentuser
+		/// </summary>
+		/// <param name="wordApplication"></param>
+		private static void InitializeVariables(IWordApplication wordApplication) {
+			if (wordApplication == null || wordVersion != null) {
+				return;
+			}
+			try {
+				wordVersion = new Version(wordApplication.Version);
+				LOG.InfoFormat("Using Word {0}", wordVersion);
+			} catch (Exception exVersion) {
+				LOG.Error(exVersion);
+				LOG.Warn("Assuming Word version 1997.");
+				wordVersion = new Version((int)OfficeVersion.OFFICE_97, 0, 0, 0);
+			}
 		}
 	}
 }

GreenshotOfficePlugin/OfficeInterop/ExcelInterop.cs

@@ -23,38 +23,64 @@ namespace Greenshot.Interop.Office {
 	// See http://msdn.microsoft.com/en-us/library/microsoft.office.interop.excel.application.aspx
 	[ComProgId("Excel.Application")]
 	public interface IExcelApplication : ICommon {
-		IWorkbook ActiveWorkbook { get; }
+		IWorkbook ActiveWorkbook {
+			get;
+		}
 		//ISelection Selection {get;}
-		IWorkbooks Workbooks { get; }
-		bool Visible { get; set; }
+		IWorkbooks Workbooks {
+			get;
+		}
+		bool Visible {
+			get;
+			set;
+		}
+		string Version {
+			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] { get; }
+		IWorkbook this[object Index] {
+			get;
+		}
 	}
 
 	// See: http://msdn.microsoft.com/en-us/library/microsoft.office.interop.excel.workbook.aspx
 	public interface IWorkbook : ICommon {
-		IWorksheet ActiveSheet { get; }
-		string Name { get; }
+		IWorksheet ActiveSheet {
+			get;
+		}
+		string Name {
+			get;
+		}
 		void Activate();
-		IWorksheets Worksheets { get; }
+		IWorksheets Worksheets {
+			get;
+		}
 	}
 
 	// See: http://msdn.microsoft.com/en-us/library/microsoft.office.interop.excel._worksheet_members.aspx
 	public interface IWorksheet : ICommon {
-		IPictures Pictures { get; }
-		IShapes Shapes {get; }
-		string Name { get; }
+		IPictures Pictures {
+			get;
+		}
+		IShapes Shapes {
+			get;
+		}
+		string Name {
+			get;
+		}
 	}
 
 	// See: http://msdn.microsoft.com/en-us/library/microsoft.office.interop.excel.iworksheets_members.aspx
 	public interface IWorksheets : ICommon, ICollection {
 		// Use index + 1!!
-		IWorksheet this[object Index] { get; }
+		IWorksheet this[object Index] {
+			get;
+		}
 	}
 
 	public interface IPictures : ICommon, ICollection {

GreenshotOfficePlugin/OfficeInterop/OfficeInterop.cs

@@ -21,11 +21,23 @@
 using System.Collections;
 
 namespace Greenshot.Interop.Office {
+	public enum OfficeVersion : int {
+		OFFICE_97 = 8,
+		OFFICE_2000 = 9,
+		OFFICE_2002 = 10,
+		OFFICE_2003 = 11,
+		OFFICE_2007 = 12,
+		OFFICE_2010 = 14,
+		OFFICE_2013 = 15
+	}
+
 	/// <summary>
 	/// If the "type" this[object index] { get; } is implemented, use index + 1!!! (starts at 1)
 	/// </summary>
 	public interface ICollection : ICommon, IEnumerable {
-		int Count { get; }
+		int Count {
+			get;
+		}
 		void Remove(int index);
 	}
 }