Re^8: Perl program calling external .dll functions

No way. "L" does not create a string.

Obviously, but if he knew how to do it, he wouldn't have to ask the question.

Given the "String" in the supplied prototype, I rather more inclined to think he intended to pass '123456789' as a string, but used the wrong parameter code (L rather than P), rather than believe that he intended that a string of ascii decimals would be converted to a number and encoded as a pointer. To...something?

Aren't you?

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority".

In the absence of evidence, opinion is indistinguishable from prejudice.

Comment on Re^8: Perl program calling external .dll functions

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Re^9: Perl program calling external .dll functions by ikegami (Patriarch) on Mar 18, 2011 at 21:56 UTC
Of course I still think "L" is wrong. ("Whatever it is, it's definitely not a uint32_t as you're telling Win32::API it is.") You're the only one who suggested otherwise. ("Passed by reference this would render an address, which on a 32-bit platform will usually come through successfully as a 32-bit numeric.") I'm inclined to think it's neither of the options you presented, though. C++ does have a class named `String`. Waiting on the OP for clarification. (Upd: Oops, it's actually "`string`" (in the "`std`" namespace). ) If he does mean C++'s `String`, I doubt the layout of the class is defined. A portable solution would be impossible without processing the appropriate .h file. That's why I recommended Inline::CPP.	[reply] [d/l] [select]

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Re^9: Perl program calling external .dll functions
by ikegami (Patriarch) on Mar 18, 2011 at 21:56 UTC

Of course I still think "L" is wrong. ("Whatever it is, it's definitely not a uint32_t as you're telling Win32::API it is.") You're the only one who suggested otherwise. ("Passed by reference this would render an address, which on a 32-bit platform will usually come through successfully as a 32-bit numeric.")

I'm inclined to think it's neither of the options you presented, though. C++ does have a class named String. Waiting on the OP for clarification. (Upd: Oops, it's actually "string" (in the "std" namespace). )

If he does mean C++'s String, I doubt the layout of the class is defined. A portable solution would be impossible without processing the appropriate .h file. That's why I recommended Inline::CPP.

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