   Add new compiler to VS .net
  Is it possible to add extra compilers to Visual Studio .NET?  I want to add the various free ones you get around, my old VS6 compiler and also the normal compiler using STLport instead.I am not asking about adding include and library directories or anything more something like a build setting.  You have Release and Debug etc for projects, but I want compilers and new settings.Thanks for any help. 
  If you just want to use the VC++6 compiler, you can probably just substitute the VS.NET cl.exe for the VC++6 one. If you want to incorporate something completely different(new compilers, new languages etc), you have to look into VSIP: http://www.vsipdev.com/Going down the VSIP route requires quite a bit of COM-fu.   --AnkhSVN - A Visual Studio .NET Addin for the Subversion version control system.[Project site] [Blog] [RSS] [Browse the source] [IRC channel] ;  Well thanks...I guess I will look into this as I would like all my compilers under a single IDE. ;  Alternativelly you could use the custom build settings - not exactly convenient for a large project granted.... ;  come to think of it, is it possible to substitue VC6 cl.exe with VS.NET cl.exe? Will there any incompatibility issue? ;  try it, I think there will be a lot but who knows! 