windows系统常用目录（开发使用）
目前最经常使用的是%APPDATA%
| 变量 | 描述 |
|---|---|
| %WINDIR% | |
| %SYSTEMROOT% | |
| %SYSTEMDRIVE% | |
| %HOMEDRIVE% | |
| %USERPROFILE% | |
| %HOMEPATH% | |
| %TMP% | {当前用户临时文件夹 - C:\DOCUME1\wy\LOCALS1\Temp} |
| %TEMP% | {当前用户临时文件夹 - C:\DOCUME1\wy\LOCALS1\Temp} |
| %APPDATA% | |
| %PROGRAMFILES% | |
| %COMMONPROGRAMFILES% | |
| %USERNAME% | |
| %ALLUSERSPROFILE% | |
| %OS% | |
| %COMPUTERNAME% | |
| %NUMBER_OF_PROCESSORS% | |
| %PROCESSOR_ARCHITECTURE% | |
| %PROCESSOR_LEVEL% | |
| %PROCESSOR_REVISION% | |
| %USERDOMAIN% | |
| %COMSPEC% | |
| %PATHEXT% | |
| %PATH% |
