Available in 3ds Max 2011 and higher.
<adsk_Utility_SimpleMixer>.blend_amount : float
<adsk_Utility_SimpleMixer>.color_a : fRGBA color
<adsk_Utility_SimpleMixer>.color_b : fRGBA color
<adsk_Utility_SimpleMixer>.blend_amount_connected : boolean
<adsk_Utility_SimpleMixer>.blend_amount_shader : texturemap
<adsk_Utility_SimpleMixer>.blend_amount_paramName : string
<adsk_Utility_SimpleMixer>.color_a_connected : boolean
<adsk_Utility_SimpleMixer>.color_a_shader : texturemap
<adsk_Utility_SimpleMixer>.color_a_paramName : string
<adsk_Utility_SimpleMixer>.color_b_connected : boolean
<adsk_Utility_SimpleMixer>.color_b_shader : texturemap
<adsk_Utility_SimpleMixer>.color_b_paramName : string
<adsk_Utility_SimpleMixer>.TheList : maxObject array
<adsk_Utility_SimpleMixer>.Shader_Version : integer