Here we crash: DrawLine(color, vFinalPos.x, vFinalPos.y+ m_pSize2d->y+1, vFinalPos.x + m_pSize2d->x, vFinalPos.y+ m_pSize2d->y+1, 1.0f);

Unhandled exception at 0x0029fe59 in winRTSimpleApp.exe: 0xC0000005: Access violation reading location 0x00000000.

Save path is
Caching out audio/click.wav

What for this not working version that is in svn???
Though the concept ideas of the sdk are rather good.