VC++ 在Watch窗口显示GetLastError值以及详细信息

　　You can display the value GetLastError() will return by putting "@err" in your watch window.

　　You can see the error message associated with that value by putting "@err,hr" in your watch window.

　　If you've placed an HRESULT in a variable, adding ",hr" to the variable name in the watch window will display the associated text.

　 　

　　The Watch windows or the QuickWatch dialog support some special (debugger-recognized) variables called pseudovariables.

　　The documented one include:

• $tid – the thread ID of the current thread
• $pid – the process ID
• $cmdline – the command line string that launched the program
• $user – information for the account running the program
• $registername – displays the content of the register registername

　　更详细：https://msdn.microsoft.com/en-us/library/ms164891.aspx