internal static extern unsafe int FsQuerySubpageHeightDefinedColumnSpanAreaList(
IntPtr pfsContext, // IN: ptr to FS context
IntPtr pSubPage, // IN: ptr to subpage
int cArraySize, // IN: size of array of track descriptions
FSTRACKDESCRIPTION* rgColumnDescription, // OUT: array of track descriptions for areas
out int cActualSize); // OUT: actual number of height-defined areas
internal static extern unsafe int FsQuerySubpageBasicColumnList(
IntPtr pfsContext, // IN: ptr to FS context
IntPtr pSubPage, // IN: ptr to subpage
int cArraySize, // IN: size of array of track descriptions
FSTRACKDESCRIPTION* rgColumnDescription, // OUT: array of track descriptions
out int cActualSize); // OUT: actual number of tracks