MeshVertexColorListSetColor Method (Int32, Color)
If [index] is less than [Count], the existing vertex at [index] will be modified.
If [index] equals [Count], a new vertex is appended to the end of the vertex list.
If [index] is larger than [Count], the function will return false.
public bool SetColor( int index, Color color )
Public Function SetColor ( index As Integer, color As Color ) As Boolean