Incorrect definition of the THUMBBUTTON record in the shlobj unit

Summary

Incorrect definition of the THUMBBUTTON record in the shlobj unit.

System Information

• Operating system:

  Windows

• Processor architecture:

  x64

• Compiler version:

  3.2.2

• Device:

Steps to reproduce

See https://forum.lazarus.freepascal.org/index.php/topic,71762.msg560664.html#msg560664

Example Project

What is the current bug behavior?

It must be defined without the packed keyword, otherwise the ITaskbarList3.ThumbBarAddButtons function does not work correctly in Windows x64.

What is the expected (correct) behavior?

Relevant logs and/or screenshots

Possible fixes

The packed keyword must be removed from the definition of the THUMBBUTTON record in the shlobj unit.