Question

I’m working on a couple of different things and some use tabs, some use 2 spaces for indents, another users 4 spaces for indents etc.

The option to set this in Visual Studio is in Tools->Options->Text Editor-><language>->Tabs

Is there some way to override these settings on a per solution bases?

Answer 1

Here is one (admittedly hacky) way to achieve what you are looking for:

1) create a macro that changes the indentation (source)

 Sub Set-Indent(indent As integer)
     Dim props As EnvDTE.Properties = DTE.Properties("TextEditor", "C/C++")
     Dim ts As EnvDTE.Property = props.Item("TabSize")
     Dim ins As EnvDTE.Property = props.Item("IndentSize")
     ts.Value = indent 
     ins.Value = indent 
 End Sub

2) Hook that up with your solution loading:
In the macro explorer, choose
EnvironmentEvents, select SolutionEvents in the first drop-down, Opened in the second.
You now have a macro that will trigger every time you open a solution.
You just need to map your solutions to the required indentation.