Is it possible to accept custom command line parameters with Inno Setup

Question

I am preparing an installer with Inno Setup. But I\'d like to add an additional custom (none of the available parameters) command line parameters and would like to get the v

Answer 1

I've modified a little bit knguyen's answer. Now it's case insensitive (you can write en console /myParam or /MYPARAM) and it can accept default value. Also I fixed the case when you receive larger parameter then expected (for ex: /myParamOther="parameterValue" in place of /myParam="parameterValue". Now myParamOther doesn't match).

function GetCommandlineParam(inParamName: String; defaultParam: String): String; 
var
   paramNameAndValue: String;
   i: Integer;
begin
   Result := defaultParam;

   for i := 0 to ParamCount do
   begin
     paramNameAndValue := ParamStr(i);
     if  (Pos(Lowercase(inParamName)+'=', AnsiLowercase(paramNameAndValue)) = 1) then
     begin
       Result := Copy(paramNameAndValue, Length(inParamName)+2, Length(paramNameAndValue)-Length(inParamName));
       break;
     end;
   end;
end;