Is it possible to create a 16 bits float renderable surface with MSAA enabled?

I can create a 16 bits float surface without MSAA with this parameter:

```
int attr[] =
{
WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_FLOAT_ATI,
WGL_SUPPORT_OPENGL_ARB, TRUE,
WGL_DRAW_TO_PBUFFER_ARB, TRUE,
WGL_RED_BITS_ARB, 16,
WGL_GREEN_BITS_ARB, 16,
WGL_BLUE_BITS_ARB, 16,
WGL_ALPHA_BITS_ARB, 16,
WGL_DEPTH_BITS_ARB, 24,
WGL_DOUBLE_BUFFER_ARB, FALSE,
0
};
```

I can create a 8 bits surface with MSAA with this parameter:

```
int attr[] =
{
WGL_SUPPORT_OPENGL_ARB, TRUE,
WGL_DRAW_TO_PBUFFER_ARB, TRUE,
WGL_RED_BITS_ARB, 8,
WGL_GREEN_BITS_ARB, 8,
WGL_BLUE_BITS_ARB, 8,
WGL_ALPHA_BITS_ARB, 8,
WGL_DEPTH_BITS_ARB, 24,
WGL_DOUBLE_BUFFER_ARB, FALSE,
WGL_SAMPLE_BUFFERS_ARB, GL_TRUE,
WGL_SAMPLES_ARB, 6,
0
};
```

But when I use this parameter to create a 16 bits float surface with MSAA, wglChoosePixelFormatARB return a count of 0.

```
int attr[] =
{
WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_FLOAT_ATI,
WGL_SUPPORT_OPENGL_ARB, TRUE,
WGL_DRAW_TO_PBUFFER_ARB, TRUE,
WGL_RED_BITS_ARB, 16,
WGL_GREEN_BITS_ARB, 16,
WGL_BLUE_BITS_ARB, 16,
WGL_ALPHA_BITS_ARB, 16,
WGL_DEPTH_BITS_ARB, 24,
WGL_DOUBLE_BUFFER_ARB, FALSE,
WGL_SAMPLE_BUFFERS_ARB, GL_TRUE,
WGL_SAMPLES_ARB, 6,
0
};
```

Im using the Catalyst 5.11.