I was hoping the following code would give me the target of an adnertised shortcut in Windows. Well, in the code below, to MS Word 2007 installed on my PC.

use 5.10.0;
use strict;
use warnings;

use Win32::API;


# UINT MsiGetShortcutTarget(
  # __in   LPCTSTR szShortcutTarget,
  # __out  LPTSTR szProductCode,
  # __out  LPTSTR szFeatureId,
  # __out  LPTSTR szComponentCode
# );

my $MsiGetShortcutTarget = Win32::API->new(
    'msi.dll', 'UINT MsiGetShortcutTarget(LPCTSTR targetFile, LPTSTR p
+roductCode, LPTSTR featureID, LPTSTR componentCode)',
);


my( $file, $product, $feature, $component ) = (
    'Microsoft Office Word 2007.lnk',
    "\0" x 39,
    "\0" x 39,
    "\0" x 39
);

my $retCode = $MsiGetShortcutTarget->Call( $file, $product, $feature, 
+$component );

say $retCode;

$product =~ s/\0.*$//;
$component =~ s/\0.*$//;
say "$product|\n$feature|\n$component|";




# INSTALLSTATE MsiGetComponentPath(
  # __in     LPCTSTR szProduct,
  # __in     LPCTSTR szComponent,
  # __out    LPTSTR lpPathBuf,
  # __inout  DWORD *pcchBuf
# );

my $MsiGetComponentPath = Win32::API->new(
   'msi.dll', 'MsiGetComponentPath', 'PPPP', 'I'
);


my( $path, $pathLength ) = ( "\0" x 260, "\0" x 8 );

my $installState = $MsiGetComponentPath->Call( $product, $component, $
+path, $pathLength );
say $installState;

$pathLength = unpack( 'L', $pathLength );
say $pathLength;

say "{$path}";

[download]

After a call to MsiGetShortcutTarget() I get return code 0 (success), and correct values for the product feature and component.

After a call to MsiGetComponentPath(), I get the correct $pathLength ( on my PC its 54 -> 

C:\Program Files\Microsoft Office\Office12\WINWORD.EXE
).. but the $path is unchanged - it's still 260 blank chars.

What am I doing wrong?

In reply to A little help with Win32::API? by flamey

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