void * MLUserData (MLINK link, MLUserFunction *fp) returns the data object and function pointer installed by MLSetUserData().
MLUserFunction is a MathLink type that describes a function pointer to a function taking an MLINK argument with a return type of void.
You can enhance the appearance of 3D graphics in Mathematica by changing the direction and color of plot lighting. Lighting , an option for Graphics3D and related functions, ...
Selectable is an option for displayed objects, cells, and notebooks that specifies whether their contents can be selected interactively using the front end.
FreeCDF (.cdf) creates a new Computable Document Format (CDF) file.
FrameLabel is an option for Graphics, Manipulate, and related functions that specifies labels to be placed on the edges of a frame.
Boxed
(Built-in Mathematica Symbol) Boxed is an option for Graphics3D that specifies whether to draw the edges of the bounding box in a three-dimensional picture.
Arrow
(Built-in Mathematica Symbol) Arrow[{pt_1, pt_2}] is a graphics primitive that represents an arrow from pt_1 to pt_2.Arrow[{pt_1, pt_2}, s] represents an arrow with its ends set back from pt_1 and pt_2 by ...
FrameStyle is an option for Graphics, Grid, and other constructs that specifies the style in which to draw frames.
GUIObjectQ[ref] returns True if ref is an active GUIObject and otherwise returns False.