The outlined/glow effect implementation of IHFont doesn't know how to draw characters. Instead, it uses an IFont object the caller specifies to render characters to screen. It then applies the glow effect to them. Application may use this routine to add a glow effect to an existing IFont object if they have one handy.
For example, if an application is creating IFont objects itself, it may use this routine to create an IHFont object that adds a glow effect to an IFont object it already has around.
int IHFont_SetFont(IHFont *po, IFont *piFont);
AEE_SUCCESS - if the IHFont could be set to used the specified IFont AEE_EFAILED - if an error occurred