Name "Close & Quit a program"
Caption "Close & Quit"
OutFile "Close & Quit Test.exe"
InstallDirRegKey HKCU "Software\WinAmp" ""

Section ""
  
  FindWindow $R0 "BaseWindow_RootWnd"
  ;SendMessage $R0 ${WM_QUIT} "" ""
  SendMessage $R0 ${WM_CLOSE} "" ""

SectionEnd