I suspect that the problem is that TCHAR is not a type that Win32::API::Type knows about. You can find the list of those that it does know about at the bottom of the Type.pm source file.

You probably need to change 

Win32::API::Type->typedef( 'OMDTEXTZ', 'TCHAR');

[download]

to something like 

Win32::API::Type->typedef( 'OMDTEXTZ', 'unsigned char')
    or die $^E;

[download]

However, if you were to add some error checking to your calls (as above and in my original snippet. E.g. ...or die $^E;), then the module would be telling you what is wrong and where.

Examine what is said, not who speaks.
"Efficiency is intelligent laziness." -David Dunham
"Think for yourself!" - Abigail
"Memory, processor, disk in that order on the hardware side. Algorithm, algoritm, algorithm on the code side." - tachyon

In reply to Re^3: Win32::API - How to call an Imported function with Win32::API::Types ? by BrowserUk
in thread Win32::API - How to call an Imported function with Win32::API::Types ? by fx

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.