Signature="$Windows NT$"
[DefaultInstall]
AddReg=SublimeText3
[SublimeText3]
hkcr,"*\shell\SublimeText3",,,"open with Sublime text"
hkcr,"*\shell\SublimeText3\command",,,"""%1%sublime_text.exe"" ""%%1"" %%*"
hkcr,"DirectoryshellSublimeText3",,,"open with Sublime text"
hkcr,"*\shell\SublimeText3","Icon",0x20000,"%1%sublime_text.exe, 0"
hkcr,"DirectoryshellSublimeText3command",,,"""%1%sublime_text.exe"" ""%%1"""
最后把上述代码保存到sublime text的安装目录下，文件后缀名为inf，然后右键安装。点击刚刚的inf文件，你会发现已经有了open with sublime text(这个为你自定义的右键菜单选项)
参考链接为：http://yuncode.net/code/c_534c920d0709512