Desktop icon using inno setup

Hello all,
Could anyone plz tell me how to add desktop icon only on request(Not default).
I'm using Inno Setup. My code is,
Name: "{userdesktop}\S/W [S/W-VERSION]"; Filename: "{app}\S/W.exe"; WorkingDir: "{app}"; Tasks: desktopicon singleuser
Name: "{commondesktop}\S/W [S/W-VERSION]"; Filename: "{app}\S/W.exe"; WorkingDir: "{app}"; Tasks: desktopicon allusers

This one is creating the desktop icon by default. I dont want like that. I want it only on selection. The selection variable here is desktopicon.

Thanks in advance
Sugan

Example:

Code:

---

Name: desktopicon; Description: {cm:CreateDesktopIcon}; GroupDescription: {cm:AdditionalIcons}; Flags: unchecked

---