The problem is your passing a string constant for the last parameter of OpenFileMapping(). Seems like it would be a safe bet I know, given that the prototype is defined as LPCTSTR.
The problem is that the C code underlying the API is expecting strings to be null terminated and Perls strings aren't by default. To correct this, Win32::API has to add a null before passing them along. Rather than copying the string you pass into a temporary variable and then appending the null, it simply tacks a null on the end of the string you pass--but if it is a constant, it's read-only and you get the error.
The upshot is, if you assign your constant to a variable, and then pass the variable, then null can be added successfully and the error goes away.
Examine what is said, not who speaks.
"Efficiency is intelligent laziness." -David Dunham
"Think for yourself!" - Abigail
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