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How manage mails and attachments with a c# application for windows

I should create a C# application to manage the mail and attachments that arrive to me on Office 365 (Outlook).
In the app I would like to select from which domains you need to download the mail, based on this the app downloads only the related emails with attachments and shows them to me. This way I can decide what to print or not.
I need this app because I have to record all the projects that come to me from clients, architecture projects and therefore I need to divide everything according to the client.
Can you tell me what is the best way to develop this?
I mean if it is better to create VSTO for Outlook or something else or if there is other way. I would like to start with the right method.
I had thought about installing Outlook on the client, synchronized with Office 365, creating a VSTO that takes care of copying the interested emails (selecting just the domains of interest) and putting attachments in various folders, showing the attachments in an orderly manner and grouped.
Can you suggest me the best method?
I mean at the structural level (how to design system), and not at the code level (which I think I know it).
Thanks so much

You are right, you can develop a VSTO based add-in where you may handle the NewMailEx event of the Application class. This event fires once for every received item that is processed by Microsoft Outlook. The item can be one of several different item types, for example, MailItem, MeetingItem, or SharingItem.
The NewMailEx event fires when a new message arrives in the Inbox and before client rule processing occurs. You can use the Entry ID returned in the EntryIDCollection array to call the NameSpace.GetItemFromID method and process the item. Use this method with caution to minimize the impact on Outlook performance.
To save the attached files you can use the MailItem.Attachments property which returns an Attachments object that represents all the attachments for the specified item. Use the Attachment.SaveAsFile method which saves the attachment to the specified path.
If TypeName(myItem) = "MailItem" Then
Set myAttachments = myItem.Attachments
'Prompt the user for confirmation
Dim strPrompt As String
strPrompt = "Are you sure you want to save the first attachment in the current item to the Documents folder? If a file with the same name already exists in the destination folder, it will be overwritten with this copy of the file."
If MsgBox(strPrompt, vbYesNo + vbQuestion) = vbYes Then
myAttachments.Item(1).SaveAsFile Environ("HOMEPATH") & "\My Documents\" & _
myAttachments.Item(1).DisplayName
End If
Else
MsgBox "The item is of the wrong type."
End If
End Sub
See Walkthrough: Create your first VSTO Add-in for Outlook to get started quickly.

Modifying a copy/paste item in Outlook prior to save (C#)

I recently wrote an Outlook plug-in (for use in Outlook 2010) for a client that syncs up their user's Outlook databases with a third-party application. This works fine. However, one thing that the client wants to do is to leverage standard copy/paste functionality to duplicate records in Outlook. The issue is that I define a UserProperty for any Outlook record that has been sent to the third-party system (it stores the internal ID from the third-party system). When the client performs a copy/paste, this UserProperty is also copied (which is bad as it creates multiple records with the same third-party ID). I was wondering if there was some way to detect via code that a copy/paste was occurring and to make a modification in the record (removal of this UserProperty) prior to save. As they might perform this on Tasks, Appointments, or Contacts, I would need guidance that would apply across the board.
Per the suggestions below, I attempted to leverage BeforeItemPaste, as seen below:
private void ThisAddIn_Startup(object sender, System.EventArgs e) {
Globals.ThisAddIn.Application.ActiveExplorer().BeforeItemPaste += new Outlook.ExplorerEvents_10_BeforeItemPasteEventHandler(Item_BeforeItemPaste);
}
private void Item_BeforeItemPaste(ref System.Object ClipboardContent,
Microsoft.Office.Interop.Outlook.MAPIFolder Target, ref bool Cancel) {
System.Windows.Forms.MessageBox.Show("Trying to paste");
}
The message appears the very first time I do a copy/paste, and then never again. I tried leveraging Application.Explorers, which theoretically gives me access to all Explorers in Outlook, but that didn't give me access to the individual ones (Appointment, Task, Contact) that I was looking for (there was only one element in that 'array' when I debugged it). Also, I tried to access those specific Explorer items by invoking MAPIFolder.GetExplorer, but this always returned null.

Try to use Explorer.BeforeItemPaste event.

Inventory Remote Computers for PST's connected to Outlook?

I've been searching for a solution for a few days now, I've looked through the MSDN for Interop.Outlook and I think I've found what I need, but can't seem to implement it properly.
Here's the code I've came up with based on something similar I saw in VBA.
class Program
{
Stores allstores = new Stores();
Store store;
static void Main(string[] args)
{
foreach (var store in allstores)
{
MessageBox.Show(store.FilePath);
}
}
}
`
This essentially needs to cycle through a list of computers, and run this code on their outlook(some 2003, some 2007) in order to inventory all connected PST's in each outlook profile. I'm sure there's more code to this, but I can't get this portion to work at all. There seems to be a lack of information on inventorying Outlook data files, most of it is reading e-mails from the mailboxes and not the data file itself.
If someone could shed some light on what I'm overlooking, It'd be greatly appreciated.
EDIT:
I've actually made a working piece of code now, however I have a problem with compatibility. The program works as designed in Office 2010/2007, however it crashes when accessing a 2003 version. I imagine I need to use the Microsoft Office Object 11.0, however I only have Microsoft Office Object 12.0 listed - is there a way to get the 11.0 reference?

This may be of use, pretty thorough object model comparison and development guide.

There is no reason to actually log to any Outlook profiles (which might require an authentication prompt). All the information is already in the profile section in the registry. The exact location is Outlook version specific, and the profile section guids are generated randomly, so the documented profile management API (IProfAdmin etc.) is the way to go, but unfortunately it is Extended MAPI and requires C++ or Delphi.
As of Outlook 2007, Outlook Object Model exposes Namespace.Stores collection and Store.FilePath property, so you can loop through all stores and read the FilePath property for each store (be sure to filter out OST files).
Note that there can be multiple Outlook profiles (as shown in Control Panel | Mail | Show Profiles), but Outlook can only work with one profile at a time, so to use a different profile, you'd need to close Outlook.
If using Redemption is an option (I am its author), it includes ProfMan library (accessible in any language) which will let you extract all PST file locations from all local profiles without actually logging in.:
'Print the path to all the PST files in all profiles
PR_PST_PATH = &H6700001E
set Profiles=CreateObject("ProfMan.Profiles")
for i = 1 to Profiles.Count
set Profile = Profiles.Item(i)
set Services = Profile.Services
Debug.Print "------ Profile: " & Profile.Name & " ------"
for j = 1 to Services.Count
set Service = Services.Item(j)
If (Service.ServiceName = "MSPST MS") or (Service.ServiceName = "MSUPST MS") Then
'there should be only one provider for this service
'but we should really loop through all the providers
Debug.Print Service.Providers.Item(1).ProfSect.Item(PR_PST_PATH)
End If
next
next

C# Word automation makes Windows Explorer crash

I have written a C# program which import a product list from a .xlsx file and let the user create an order based on that product list.
When the user is finished, the program builds one or more system specifications based on the order.These specifications is written to a .docx file. I have Office 2007 installed on the computer and are using the Microsoft.Office.Interop.Excel and the Microsoft.Office.Interop.Word namespaces.
The problem:
After I have runned the program, Windows Explorer crashes very often and has to restart. This happens when navigating in folders or when right- clicking on folders etc.
This also happens after the program have been closed and the only solution to make it stop is to restart the computer. It seems like it only happens when I have created the output files (.docx). If i start the program and use it like I normally do, but without creating the word files, the problem don't seem to occur.
After the program have created the output files, Word gets "Visible" to the user for manual editing. The user closes the word application when finished editing the documents.
What can make the Windows Explorer crash when running word automation?
I really need help on this one. Any suggestions are welcome.

After execution, do you have ghost excel.exe and word.exe processes remaining?
These ghost are likely to make the system unstable.
You're likely not releasing properly the COM objects you instantiated via automation.
Use Marshal.ReleaseComObject(yourobj); on each and every COM objects you instantiate. It's a real pain, I know.
Note: be sure that you don't instantiate COM objects without knowing it:
mySheet = myExcelObject.workbooks[0].Sheet[0] won't just instantiate a sheet object, but also a workbook object.
Rule of thumb: never ever use a secondary property on a COM object ( foo.bar.baz ) and release everything.
Final note: don't use office automation at all on the server, it's bad, per Microsoft own words, there are fully managed libraries for that.

Windows 7 taskbar - jumplist, jumplistlink and jumplistitem

I am using the Windows API Code Pack for Microsoft .NET Framework to try out of some of the new UI features of the Win7 taskbar. I am coding in C#.
I have a question regarding jumplists. All of the sample code provided assumes that the entries on the jump list are used to call out to run a particular application or open a document, e.g. a text document in a MRU list or run mspaint.exe.
I would like to implement some items which allow me to set state in my own application (i.e. the app which is interacting with the taskbar). MSN Messenger does this, for example, when you can set your status (Busy, Offline etc.).
Try as I might, I cannot create a JUmpListItem or JumpListLink to behave in this way - it treats them as applications or documents.
Does anyone have any samples of how to create an item which raises an event in the same application that created it? I am sure it is simple but I am being very daft.
Many thanks for your help.

I believe what you'd want to do is to call your application with a special set of flags (i.e. launch the executable with certain arguments). At application start up, you'd check to see what flags are set, then send a message to the main instance of the application and then exit out of the new instance.

Using the TaskBarDemo, to open an item created by your application would have to be referenced, ie if your program created a PDF file you would do this:
jumpList.AddUserTasks(new JumpListLink(Path.Combine(systemFolder, "C:\\Program Files\\Adobe\\Reader 9.0\\Reader\\AcroRD32.exe"), "Open Adobe Reader")
{
IconReference = new IconReference(Path.Combine(systemFolder, "C:\\Program Files\\Adobe\\Reader 9.0\\Reader\\AcroRD32.exe"), 0)
});
Otherwise you would have to ensure that your application registered file associations, for recent or frequent items.
I had a few problems with jumplists with the API Pack, i now use VS 2010 Beta 2 and let shell handle the jumplists.
Hope this is helpfull.

These tasks are some sort of IShellLink. Then, you should call ICustomDestinationList's AddUserTasks. Look up samples in Windows 7 Training Kit.