Inject text in a rundll32.exe window

Question

I must enter a username/password within a rundll32.exe process window. I've tought of the following:

1. Get Login window handle from the rundll32.exe process
2. Focus the window
3. Inject the text in 2 textbox and click the ok button

Is it possible to do that in .NET or I must resort to lower level win32 api? Anywone as done that before and could point me in the right direction?

Answer 1

You are attempting to retrieve the window handle of the Exchange login dialog of the MAPI application (probably outlook), FROM a rundll32.exe process. This can be done from .Net using the SendKeys class, but this is not completely reliable:

• http://msdn.microsoft.com/en-us/library/system.windows.forms.sendkeys.send(v=vs.110).aspx.

Alternatively you could establish the NETBIOS session in advance using NetUseAdd to establish a session. If this is successful, you will not need to enter the username and password. I don't know if this works with Exchange, but it does work with some other applications which use integrated authentication:

• http://msdn.microsoft.com/en-us/library/windows/desktop/aa370645(v=vs.85).aspx