public static extern bool SetupFindFirstLine(IntPtr InfHandle, [MarshalAs(UnmanagedType.LPTStr)] string Section, [MarshalAs(UnmanagedType.LPTStr)] string Key, ref INFCONTEXT Context);

Public Declare Auto Function SetupFindFirstLine Lib "setupapi.dll" (ByVal InfHandle As IntPtr, ByVal Section As String, ByVal Key As String, ByRef Context As INFCONTEXT) As Boolean

If the InfHandle parameter references multiple INF files that have been appended together using SetupOpenAppendInfFile, the SetupFindFirstLine function searches across the specified section in all of the files referenced by the specified HINF.

if (SetupFindFirstLine(infHandle, "Manufacturer", null, ref Context) == true)

If SetupFindFirstLine(infHandle, "Manufacturer", Nothing, Context) = True Then

Documentation

[SetupFindFirstLine] on MSDN

3: SetupFindNextLine

ContextIn

Pointer to the INF file context retrieved by a call to the SetupFindFirstLine function.

if (SetupFindFirstLine(infHandle, "Manufacturer", null, ref Context) == true)

If SetupFindFirstLine(infHandle, "Manufacturer", Nothing, Context) = True Then

4: SetupFindNextMatchLine

ContextIn

Pointer to the INF file context retrieved by a call to the SetupFindFirstLine function.