首先需要编写注册表：
以Steam为例：
"C:Program Files (x86)SteamSteam.exe"
然后编写注册表：
Windows Registry Editor Version 5.00 [HKEY_CLASSES_ROOTsteam] @="" "URL Protocol"="C:\Program Files (x86)\Steam\Steam.exe" [HKEY_CLASSES_ROOTsteamDefaultIcon] @="C:\Program Files (x86)\Steam\Steam.exe" [HKEY_CLASSES_ROOTsteamShell] [HKEY_CLASSES_ROOTsteamShellOpen] [HKEY_CLASSES_ROOTsteamShellOpenCommand] @="C:\Program Files (x86)\Steam\Steam.exe"
保存，然后双击运行注册
然后编写一个页面：
<html> <head> </head> <body> <a href="steam://">打开Steam</a> </body> </html>
页面效果：
