Force Inno Setup to show UAC prompt during installation

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How can I force Inno Setup to show UAC prompt if elevated privileges are required to run specific installator during my setup? Skipping to install this installator is not critical. I found out that I can specify AfterInstall function to test if privilege elevation is required (IsAdminLoggedOn()), but how to show UAC prompt to run this installator as specific user?

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Megamozg On BEST ANSWER

Found the solution. So, if you need to run specific installator with elevated privileges during your setup you need:

  1. Specify your installator in Files section as follows:

    [Files]
    Source: "SomeSetup.exe"; DestDir: "{tmp}"; AfterInstall: SomeSetupAfterInstall()
    
  2. In Code section you shall define SomeSetupAfterInstall(). There you should run your installator with runas verb using ShellExec if it is not admin launched setup. It might be like this:

    procedure SomeSetupAfterInstall();
    var
        ErrorCode: Integer;
        TmpPath: String;
        RunMethod: String;
    begin
        TmpPath:=ExpandConstant('{tmp}');
        if not IsAdminLoggedOn() then
        begin
            RunMethod := 'runas';
        end else
        begin
            RunMethod := '';
        end;
        ShellExec (RunMethod, TmpPath + '\SomeSetup.exe', '', '', 
                   SW_SHOW,  ewWaitUntilTerminated, ErrorCode);
    end;