Specifies GUI Thumbnail window attributes settings.

Values:

IG_GUI_THUMBNAIL_WIDTH	The value specified is a width of image thumbnails.
IG_GUI_THUMBNAIL_HEIGHT	The value specified is a height of image thumbnails.
IG_GUI_THUMBNAIL_SHOW_TITLE	If the value specified is TRUE then image title is displayed, if FALSE - title is not displayed.
IG_GUI_THUMBNAIL_X_SPACING	The value specified is an X offset of upper left corner of thumbnail.
IG_GUI_THUMBNAIL_Y_SPACING	The value specified is an Y offset of upper left corner of thumbnail from the edge or the previous thumbnail.
IG_GUI_THUMBNAIL_SHOW_FLAT	If the value specified is FALSE then thumbnails displayed with 3D-style border, otherwise border style is flat.
IG_GUI_THUMBNAIL_BORDER_WIDTH	The value specified is a width of the border surrounding the thumbnail in pixels.
IG_GUI_THUMBNAIL_SHADOW_WIDTH	The value specified is a width of the shadow surrounding the thumbnail in pixels.
IG_GUI_THUMBNAIL_ZOOM_FACTOR	The value specified is a zoom factor applied to the thumbnail when shift and the left mouse button are selected.
IG_GUI_THUMBNAIL_INTERIOR	The value specified is a thumbnail interior border spacing in pixels.
IG_GUI_THUMBNAIL_MAGNIFY_FLAG	If the value specified is TRUE then if thumbnail is selected image will magnify; if value is FALSE - no magnification occurs.
IG_GUI_THUMBNAIL_TITLE_HEIGHT	The value specified is a height of the thumbnail title.
IG_GUI_THUMBNAIL_USE_EMBEDDED	If the value specified is TRUE then all embedded thumbnails will be used to display thumbnails; if value is FALSE then thumbnail are created from the images.
IG_GUI_THUMBNAIL_ALL_PAGES	If the value specified is TRUE then separate thumbnail will be created for every page of multi-page image; if value is FALSE then only first page thumbnail will be created for multi-page image.
IG_GUI_THUMBNAIL_TITLE_STYLE	This value has been deprecated and will be removed from the public API in a future release.
IG_GUI_THUMBNAIL_FONT_TITLE	The value specified is a HFONT handle of font to be used for thumbnail title display.
IG_GUI_THUMBNAIL_ACTIVE_ID	The value specified is an index of the currently selected icon in the thumbnail window.
IG_GUI_THUMBNAIL_MULTISELECT	If value specified is TRUE then multiple thumbnails selection is allowed.
IG_GUI_THUMBNAIL_HIGHLIGHT_COLOR	The value specified is a color for highlighted icons.
IG_GUI_THUMBNAIL_ALIAS_THRESHOLD	The value specified is an antialiasing threshold used to create 1-bit image thumbnails.
IG_GUI_THUMBNAIL_INTERPOLATION	The value specified is an interpolation mode used to create image thumbnails.

Remarks:

See IG_GUI_thumbnail_attribute_set for more details.