bool antialiasing = false;
    if( SUCCEEDED(m_pDirect3D->CheckDeviceMultiSampleType( D3DADAPTER_DEFAULT,
                    D3DDEVTYPE_HAL , D3DFMT_R8G8B8,  TRUE,
                    D3DMULTISAMPLE_2_SAMPLES, NULL ) ) )
    {
        antialiasing = true;
    }
	

I have an i7 6500U

Multisample AA has often been a bit questionable on Intel iGPUs. There's a chance it just isn't properly supported by the driver.

Okay, then, thanks