NSIS检测http默认打开程序并终止其进程

有人问相关问题，写着玩的。发出来可能对新手有帮助。
代码来自：少轻狂

Name http
OutFile http.exe
!include "FileFunc.nsh"
!include "WordFunc.nsh"

Section
  ReadRegStr $R1 HKCR "http\shell\open\command" ""
  MessageBox MB_OK "$R1"
  ${GetFileName} "$R1" $R2
  ${WordFind} "$R2" ".exe" "+1" $R3
  KillerHTTP:
    killer::KillProcess "$R3.exe"
    killer::IsProcessRunning "$R3.exe"
    Pop $R0
    StrCmp $R0 1 KillerHTTP NextHTTP
  NextHTTP:
SectionEnd