How to Read REG_MULTI_SZ Values

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D.5 How to Read REG_MULTI_SZ Values

KiCHiK wrote this script to help rpetges in this forum thread. It reads a registry value of the type REG_MULTI_SZ and prints it out. Don't forget to edit where it says "Edit this!" when you test this script. The values must point to a REG_MULTI_SZ value or the example will spit out an error.

OutFile "REG_MULTI_SZ Reader.exe"
Name "REG_MULTI_SZ Reader"
ShowInstDetails show

!define HKEY_CLASSES_ROOT        0x80000000
!define HKEY_CURRENT_USER        0x80000001
!define HKEY_LOCAL_MACHINE       0x80000002
!define HKEY_USERS               0x80000003
!define HKEY_PERFORMANCE_DATA    0x80000004
!define HKEY_PERFORMANCE_TEXT    0x80000050
!define HKEY_PERFORMANCE_NLSTEXT 0x80000060
!define HKEY_CURRENT_CONFIG      0x80000005
!define HKEY_DYN_DATA            0x80000006
!define KEY_QUERY_VALUE          0x0001
!define KEY_ENUMERATE_SUB_KEYS   0x0008
!define REG_NONE                 0
!define REG_SZ                   1
!define REG_EXPAND_SZ            2
!define REG_BINARY               3
!define REG_DWORD                4
!define REG_DWORD_LITTLE_ENDIAN  4
!define REG_DWORD_BIG_ENDIAN     5
!define REG_LINK                 6
!define REG_MULTI_SZ             7

!define RegOpenKeyEx     "Advapi32::RegOpenKeyExA(i, t, i, i, *i) i"
!define RegQueryValueEx  "Advapi32::RegQueryValueExA(i, t, i, *i, i, *i) i"
!define RegCloseKey      "Advapi32::RegCloseKeyA(i) i"

####### Edit this!

!define ROOT_KEY         ${HKEY_CURRENT_USER}
!define SUB_KEY          "Software\Joe Software"
!define VALUE            "Strings"

####### Stop editing

Section "Read"
  StrCpy $0 ""
  StrCpy $1 ""
  StrCpy $2 ""
  StrCpy $3 ""
  System::Call "${RegOpenKeyEx}(${ROOT_KEY}, '${SUB_KEY}', \
    0, ${KEY_QUERY_VALUE}|${KEY_ENUMERATE_SUB_KEYS}, .r0) .r3"
 
  StrCmp $3 0 goon
    MessageBox MB_OK|MB_ICONSTOP "Can't open registry key! ($3)"
    Goto done
goon:

  System::Call "${RegQueryValueEx}(r0, '${VALUE}', 0, .r1, 0, .r2) .r3"
 
  StrCmp $3 0 read
    MessageBox MB_OK|MB_ICONSTOP "Can't query registry value size! ($3)"
    Goto done
 
read:
 
  StrCmp $1 ${REG_MULTI_SZ} multisz
    MessageBox MB_OK|MB_ICONSTOP "Registry value no REG_MULTI_SZ! ($3)"
    Goto done
 
multisz:
 
  StrCmp $2 0 0 multiszalloc
    MessageBox MB_OK|MB_ICONSTOP "Registry value empty! ($3)"
    Goto done
 
multiszalloc:

  System::Alloc $2
  Pop $1
 
  StrCmp $1 0 0 multiszget
    MessageBox MB_OK|MB_ICONSTOP "Can't allocate enough memory! ($3)"
    Goto done
 
multiszget:
 
  System::Call "${RegQueryValueEx}(r0, '${VALUE}', 0, n, r1, r2) .r3"
 
  StrCmp $3 0 multiszprocess
    MessageBox MB_OK|MB_ICONSTOP "Can't query registry value data! ($3)"
    Goto done
 
multiszprocess:
 
  StrCpy $4 $1
 
  loop:
 
    System::Call "*$4(&t${NSIS_MAX_STRLEN} .r3)"
    StrCmp $3 "" done
    DetailPrint $3
    StrLen $5 $3
    IntOp $4 $4 + $5
    IntOp $4 $4 + 1
    Goto loop
 
done:
 
  System::Free $1
 
  StrCmp $0 0 noClose
    System::Call "${RegCloseKey}(r0)"
 
noClose:

SectionEnd

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