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Hook drag and drop of Windows Explorer with C#?

I want to write an application in C# that only opens when the user starts to drag a file in the Windows Explorer. It doesn't matter if the file will be dropped in the app, i only want to know whenever the user drags a file in explorer, and of course, when he releases it again.
I found this article, but I don't really know where to start: Detect drag and drop operations in an external application using .Net
Since I know hardly anything about hooking, I would really appreciate it if someone could give me an example of doing that, or some ideas.

How to programmatically force a break in the VBE Editor

I am writing a c# application that opens a number of PI ProcessBook display files. PI Processbook is a program that has embedded Visual Basic for Applications support, including a VBE environment.
The problem that I have is that a number of the displays I want to open have macros in them that run automatically when the display is opened. I have set the macro protection to maximum (which should disable macros completely!), but unfortunately there is something in the TypeLibrary that I am using that means that when a file is opened programatically, it bypasses macro security and the macros run anyway. Go figure....
I am therefore trying to find a way to programatically kill these macros, even if they have started. I have tried using SendKeys.Wait("^{BREAK}") to force into break mode. This "works", but is a bit hit-and-miss: I find that if the macro doesn't pause at some point, SetForegroundWindow can't force the VB Editor to the foreground to accept the sendkeys input. I therefore tried using sendmessage. I used SPY++ to see that CTRL+BREAK appears to send a WM_CANCELMODE message to the window. Apparently, this is somehow handled differently from literally ALT+Tabbing or clicking on the window with a mouse and pressing the CTRL+Break keys, in that the message gets queued, but does not appear to process until the macro has finished executing.
Does anyone have any other suggestions of things to try?

I am therefore trying to find a way to programatically kill these
macros, even if they have started.
Hold down the Shift key while opening the Spreadsheet and the Macro's wont run.
Otherwise you could try halting the code while its running: Ctrl + Alt + PauseBreak
Edit:
I have set the macro protection to maximum (which should disable
macros completely!)
Try disabling them:

Using C# or PowerShell Automate Username and Password Entry in 'Connect to ServerName' dialog box

I have a webpage that requires users to enter their credentials in a 'Connect to "ServerName"' dialog box and click OK. I want to automate this login proccess using C# or PowerShell. Is this possible? If not, is there another way of automating this?

Looks like you are trying to execute the webpage automatically and that popup is blocking you from doing that, if that the case you can use SendKeys to type in the boxes
Also a macro recorder being fired by a scheduler task will do it.
you can also instead of trying to open the webpage make a WebRequest from a C# application passing the credentials , that will lead you to the same results...
regards

It is possible, but it is probably far easier to use AutoHotkey.
It can be scripted to watch for a window of a certain name and then send keystrokes to that window automatically. Alternatively, you can set up the script so that the user just has to press some key or series of keys in that window and it will be converted to a set of keystrokes.
The download also includes a compiler, so once you get your script right you can compile it to an .exe to distribute.

c# .net interop close dialog boxes

After opening a Word document, using .NET interop, a dialog box is created that blocks programmatic editing of the opened file. The user cannot see the winword.exe process and so cannot close the dialog. Is there a way to close a dialog or to prevent them being opened on startup?
I believe it might be the dialog asking first time users to set their name and initials.
Note: I know that it would be nicer to avoid using the interops and am familiar with Aspose products.

See my answer here.
Basically, you need to disable all "alerts", such the dialog that you describe above. Instead of "MSProject", use "Word" of course.

Automatically run programs on startup and stop applications from memory on PPC

I have to stop applications when the window is closed. The window stays in the memory when click the (x) button. How can i remove the app in memory? Also another question is that i want the application to be installed when hard restart the pocket pc, how can i do it?
Thanks

By default the form will just hide when you click the X in the top right. You need to set the "MinimizeBox" property of the form to "False" for the application to close instead.
Installing the application on hard restart (often referred to as cold boot) requires that you put a CAB file for the application on the flash (persistent) memory of the device. You will then normally have to write a script and place that somewhere to call the CAB. This can vary from device to device so you'll have to look that one up.

Setting the form's MinimizeBox property to False causes the OK button to appear.
The Ok button is for closing the application instead of minimalizing

To prevent to application from minimizing which is the default behavior for PocketPC applications, set the MinimizeBox option to false on the form.
As for your second option that might be trickier because it depends on the PDA. If it has persistent memory you could put it there, and find a way to run the CAB file during initialization.
[Update]
It would appear that there is a Startup Folder in the windows menu. Perhaps you could write a utility that checks if your application is installed and if not launches the CAB installer.

The default behavior is indeed minimizing the application. Using a custom task manager which replaces the [x] you can tune this behavior. Some vendors (for instance HTC) include a custom taskmanager exactly for this purpose.
A generic but good task manager is WkTASK, here is the relevant feature description:
X button
Using the X button, you can
use some actions as follows:
Tap: really close
Tap&Hold: show context menu
Drag: some gestures (To show a program launcher, drag toward down. To
show Today, drag toward left.)
WkTASK offers a lot more, but you can fine tune it to do only what you want.