## This Pastebin is in response to Forum Post at: http://forums.winamp.com/showthread.php?t=336325

!define FindINIStr '!insertmacro _FindINIStr'  
!macro _FindINIStr _OutVar _INIFileName _MatchName _MatchValue _ReadValue  
    ;FindINIStr $0 $INIfilename 'LocalFileName=Language.DevPak' 'Version'  
    Push `${_ReadValue}`  
    Push `${_MatchValue}`  
    Push `${_MatchName}`  
    Push `${_INIFileName}`  
    Call FindINIStr  
    Pop ${_OutVar}  
!macroend  
  
Section  
      
    ${FindINIStr} $0 $INIFilePath 'LocalFileName' 'Language.DevPak' 'Version'  
    DetailPrint $0  
  
SectionEnd  
  
  
Function FindINIStr  
    # Stack:  _INIFileName _MatchName _MatchValue _ReadValue  
    Exch $0 ; r0 _MatchName _MatchValue _ReadValue  
      
    IfFileExists $0 0 FileNotFound  
      
    Exch    ; _MatchName r0 _MatchValue _ReadValue  
    Exch $1 ; r1 r0 _MatchValue _ReadValue  
    Exch 2  ; _MatchValue r0 r1 _ReadValue  
    Exch $2 ; r2 r0 r1 _ReadValue  
    Exch 3  ; _ReadValue r0 r1 r2   
    Exch $3 ; r3 r0 r1 r2  
    Push $4 ; r4 r3 r0 r1 r2  
    Push $5 ; r5 r4 r3 r0 r1 r2  
    Push $6 ; r6 r5 r4 r3 r0 r1 r2  
    Push $7 ; r7 r6 r5 r4 r3 r0 r1 r2  
    Push $8 ; r8 r7 r6 r5 r4 r3 r0 r1 r2  
    Push $9 ; r9 r8 r7 r6 r5 r4 r3 r0 r1 r2  
      
    ; $0 = _INIFileName  
    ; $1 = _MatchName  
    ; $2 = _MatchValue  
    ; $3 = _ReadValue  
    ; $4 = StrBuffer  
    ; $5 = RC / Max  
    ; $6 = Offset  
    ; $7 = Temp  
    ; $8 = Temp  
    ; $9 = ReturnValue  
  
    ## Allocate Memory  
        System::Alloc ${NSIS_MAX_STRLEN}      
        Pop $4  
         
    ## Get INI Section Names from file  
        System::Call 'Kernel32::GetPrivateProfileSectionNames(i r4,i ${NSIS_MAX_STRLEN},t r0)i .r5'  
        ## WARNING ASSUMTIONS MADE HERE  
          
        StrCpy $6 0  
        StrCpy $9 ""  
        Loop:  
            IntCmp $5 $6 NoMoreSections NoMoreSections  
            System::Call '*$4(&v$6,&t${NSIS_MAX_STRLEN} .r7)'  
            StrLen $8 $7  
            IntOp $6 $6 + $8  
            IntOp $6 $6 + 1  
            ReadINIStr $8 $0 $7 $1  
            StrCmp $8 $2 0 Loop  
            ReadINIStr $9 $0 $7 $3  
        NoMoreSections:  
        StrCmp $9 "" 0 +2  
            SetErrors  
              
    System::Free $4  
      
    ## Restore The Stack  
        ;STACK:   r9 r8 r7 r6 r5 r4 r3 r0 r1 r2  
        Exch $9 ; _RetVar r8 r7 r6 r5 r4 r3 r0 r1 r2  
        Exch 9  ; r2 r8 r7 r6 r5 r4 r3 r0 r1 _RetVar  
        Pop $2  ; r8 r7 r6 r5 r4 r3 r0 r1 _RetVar  
        Pop $8  ; r7 r6 r5 r4 r3 r0 r1 _RetVar  
        Pop $7  ; r6 r5 r4 r3 r0 r1 _RetVar  
        Pop $6  ; r5 r4 r3 r0 r1 _RetVar  
        Pop $5  ; r4 r3 r0 r1 _RetVar  
        Pop $4  ; r3 r0 r1 _RetVar  
        Pop $3  ; r0 r1 _RetVar  
        Pop $0  ; r1 _RetVar  
        Pop $1  ; _RetVar  
    Return  
    FileNotFound:  
        Pop $0  
        Push ""  
        SetErrors  
FunctionEnd