PROBLEMS ENCOUNTERED IN THE HELLOWIN PROGRAM

It's not a break problem at all, your program is missing a return, and the penultimate line is changed to:

return defwindowproc (hwnd, umsg, wparam, lparam) ;

The program is ok. The reason is that you don't have a way to return messages to the system. Windows doesn't know what your program is going to do after CreateWindow, except for paint and destroy.

At the end of the first message loop, Windows is waiting, wondering what to do with this non-program-specified message? Messages are all stuck in the queue and don't know what to do with them, so there are processes.

and return defwindowproc (hwnd, umsg, wparam, lparam) ; I told windows that if I don't know how to deal with it, I will deal with it in the default way, so it's OK, the message loop is alive, and the window can be redrawn.

If you're having trouble installing Windows Hello, here are some solutions you can try:

Restart your computer: Sometimes, restarting your computer can fix some temporary issues. Try restarting your computer and try installing Windows Hello again.

Update your operating system: Make sure your operating system is up to date. Windows Hello may require a specific operating system update to install and run properly. Turn on Windows Update and make sure you install all available updates.

Check your hardware: Make sure your computer meets the hardware requirements to install Windows Hello. Windows Hello requires a Windows Hello-enabled camera and fingerprint sensor to function properly.

Check that your device has these hardware and that the drivers are installed correctly.

Disable security software: Some security software may interfere with the installation process of Windows Hello. Try temporarily disabling your antivirus, firewall, or other security software, and then try installing Windows Hello again.

Remember to re-enable these security software after the installation is complete.

Clean up temporary files: When there is a lot of trouble, the accumulation of temporary files can cause installation problems. Try cleaning up your system's temporary files. You can do this using a disk cleanup tool for Windows or a third-party system cleanup tool.

Contact technical support: If you've tried the above methods and still can't fix the issue, we recommend that you contact your device manufacturer or Microsoft technical support team for further help and support. They will be able to provide more specific solutions or diagnose possible problems on your computer.

If you're having trouble with the installer while using Windows Hello, here are some solutions you can try:

1.Check device compatibility: Make sure your device supports the Windows Hello feature. Check that the device specifications, drivers, and OS version meet the requirements for Windows Hello.

2.Update drivers: Updating your device's drivers may help resolve issues related to Windows Hello. You can visit the device manufacturer's official ** or use Windows Device Manager to update the drivers.

3.Enable Windows Hello service: Make sure that the Windows Hello service is enabled.

Press the Win + R keys and enter them in the Run dialog box""and press Enter. Found in the list of services"windows biometric service"to ensure that the status of the service is"Running"And the startup type is"Automatic"。

4.Clear cache and re-register: Try clearing the cache of Windows Hello and re-registering your fingerprint or facial recognition.

In Windows settings, go to"Accounts", Xun Xinyin and then select"Sign-in options"。In the Windows Hello section, you can find the appropriate options to clear the cache and re-annotate the hall.

You can search for it and run it in Windows settings"Troubleshooting", and then Tansun chooses"Add additional troubleshooting tools"to find troubleshooting tools related to Windows Hello.

6.Contact support: If you've tried the above methods and still can't fix the problem, we recommend contacting Microsoft's technical support or your device manufacturer's customer support team for further help and guidance.

Please note that before making any changes, make sure you have the appropriate permissions and back up important data to prevent the unexpected.