Hello, so5team, you wrote: S> not to pay for a Visual Studio if it is not necessary for the project of anything MS-specific. Here it is turn! Community it is free, and differs nothing from Professional. And before many years existed Express the edition which has been a little cut down, and too the free. It if to forget that on a studio piracy, and it use pretty often. Any red-eyed , really. S> not to strike with "With ++" from MS, we tell. Do not stop. Logically following step not to strike with Windows generally. S> the Vivid example - attempts of usage of library Ranges under Windows. S> It if these are necessary to you the latest SDK from . The strange development. Any left and crude features of the standard are necessary, and are not necessary. S> your judgement is very important, continue to keep informed. "I ran for you two days?" It is not important - do not answer.