fVBIClip
((fVBIClip.Left() << 0) & C_RADEON_CAP0_VBI_H_START) |
((fVBIClip.Width() << 16) & C_RADEON_CAP0_VBI_H_WIDTH));
((fVBIClip.Top() << 0) & C_RADEON_CAP0_VBI_V_START) |
((fVBIClip.Bottom() << 16) & C_RADEON_CAP0_VBI_V_END));
fVBIClip.SetTo(left, top, right, bottom);
CRadeonRect fVBIClip;