GetObject() is supposed to return the absolute height, and there's no other
way to retrieve this information after the bitmap is created.

d3dx9_36: Find, store and enable retreival of CTAB comment data in shader (based on code from Luis Busquets).

If GTL_PRECISE is passed without specifying either GTL_NUMCHARS or
GTL_NUMBYTES, behave as if GTL_NUMBYTES was passed.

The border widths documented by msdn are in points which are 72 dpi, which
is not equivalent to pixels (normally 96 dpi). I pre-converted all the
border widths to 96 dpi resolution since this avoids needed to store
fractions, and often avoids the need for convertion to the displays
resolution.