The INFCONTEXT structure stores context information that functions such as SetupGetLineText use to navigate INF files.
typedef struct _INFCONTEXT {
    HINF Inf;                  //handle of the open INF file
    HINF CurrentInf;           //handle of the current INF file
    UINT Section;              //a section of the current INF file
    UINT Line;                 //a line of the INF section
} INFCONTEXT, *PINFCONTEXT;
 Important The setup functions use this structure internally and it must not be accessed or modified by applications. It is included here for informational purposes only.
  Windows NT:  Use version 4.0 and later.
  Windows:  Use Windows 95 and later.
  Windows CE:  Unsupported.
  Header: Declared in setupapi.h.
Overview, Structures, SetupFindFirstLine, SetupFindNextLine, SetupFindNextMatchLine