ArrayAtom IndexOf Function. Determines the index of a specific Atom. ABCpdf .NET PDF Library. From ABCpdf .net previous page next page IndexOf Function Determines the index of a specific Atom. Syntax [C#]int IndexOf(Atom value) [Visual Basic]Function IndexOf(value As Atom) As Integer Params Name Description value The object to locate in the Collection. return If found, the index of value, otherwise -1. Notes Determines the index of a specific Atom in the Collection. Example None. previous page start next page