This method is slightly different in VCL and .NET edition:
A) .NET
This method is used to set the license keys. (You cannot set the DLL name - it must be encoded in the interface assembly since the [DLLImport] requires a fixed name.)
Example:
B) VCL (for Delphi and C++Builder)
procedure ViewerStart(DLLNameAndPath, licensename, licensekey: string; licensecode: Integer);
This method is used to set the license keys. Optionally the DLL name can be defined.