This solution contains three projects:
- WUAPItest tests the Windows Update API (C++, early binding to the WUAPI COM objects)
- WUAPItestTLB tests the Windows Update API (C++, late binding to the WUAPI COM objects)
- WUAPItestCs determines applicable updates and installs all updates that do not require user interaction during installation
The program is designed to be run as part of a PDQ Deploy package to install all required updates on a target system. It works outside of PDQ Deploy as well.
If the following conditions are met, it will create a file at
C:\Windows\reboot.required:
- At least one update that requires a reboot has been installed.
- The environment variable
PDQSERVERis set. - The value of this environment variable does not match the local host name. (If the value contains dots, only the part before the first dot is considered.)
- 0: No applicable updates, or all non-interactive updates installed and no reboot required
- 1: There are applicable updates, but all of them require interaction
- 1603: Installation error
- 3010: All non-interactive updates installed, reboot required
“But why? There is plenty of VBScript (or PowerShell) out there that runs entirely without a C# compiler! Just check Google!”
Well ... have you tried any of it on Windows 10 2004 recently?
A WUA API sample formerly at https://msdn.microsoft.com/en-us/library/windows/desktop/aa387102(v=vs.85).aspx. This URL now redirects to a much bigger sample script.