Migration from SES to Visual Studio unable to select custom board directory

[OwainIncus]

Hi,

I am in the process of migration from SES to Visual Studio; I have imported my project; but it has no active build configuration.
When I try and add a build configuration VS only presents me with boards it knows about and not my custom board.

How can I tell visual studio where to search for my board files.

SES let one browse for the boar directory.

Regards,

Owain

[OwainIncus]

It looks like there is a visual studio extension setting for to add boards into the search path.
But whats the syntax so I can add this relative to my project root directory?