It will be difficult for anyone to help you with this unless they also have a copy of the DLL in question. However, the first thing you should do is add some error checking to your code. You should check that $ApiObject (aweful name!) does actually aquire a value and print out $^E if it fails so that you have a clue as to why.
my $ApiObject = new Win32::API(
"C:/Documents and Settings/Mdaviesie/Desktop/dver_1.3/fileversion.
+dll",
"GetFileVersionTxt", 'PP','I'
) or die "Failed to acquire API: $^E";
Similarly, assuming that the ->Call(...) is returning, then you should be doing a similar check on the return code.
Examine what is said, not who speaks.
"Efficiency is intelligent laziness." -David Dunham
"Think for yourself!" - Abigail
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