“运行”对话框可以作为在计算机上打开程序的一种简单且非常有用的方法，但是它如何知道这些应用程序在系统中的位置呢？今天的超级用户问答帖子回答了一位好奇的读者的问题。

今天的问答环节是由SuperUser提供的，SuperUser是Stack Exchange的一个分支，是一个由社区驱动的问答网站分组。

相关：如何编辑系统路径，以便在Windows中轻松访问命令行

问题

超级用户读者mt025想知道“运行”对话框如何知道不在Windows系统路径中的应用程序的位置：

As a power user, I frequently use the Run Dialog. I can understand why the following commands work, as they are in the PATH environment variable.

• mspaint
• diskmgmt.msc
• explorer

These commands also work in CMD.

The commands below work in the Run Dialog, but they are not in the PATH environment variable, and they do not work in CMD.

• firefox
• winword
• iexplore

How does Run know where these files are?

答案

超级用户贡献者w32sh为我们提供了答案：

When you execute a command from the Run Dialog, the system looks at the App Paths registry keys here:

• HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths

and

• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths

Example

• HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\filezilla.exe

(Default) value data has the full path to the executable. If it is not found, it looks at each folder included in the PATH, whereas CMD (the Command Prompt) does not reference these registry keys, it only searches the PATH.

有什么要补充的解释吗？在评论中发出声音。想从其他精通技术的Stack Exchange用户那里了解更多答案吗？在这里查看完整的讨论主题。