They sell Visual Studio, don't they? It's not the only toolchain for Windows, but it's likely the most popular toolchain. It's Microsoft's OS. The reason tha

They sell Visual Studio, don't they? It's not the only toolchain for Windows, but it's likely the most popular toolchain. It's Microsoft's OS. The reason that they got in trouble is that they unfairly used their market position to kick competitors (Lotus, Netscape, Novell) out. I doubt it would be illegal if they decided to charge everyone equally based on either units shipped or royalty.