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how import dll functions with ref intern

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10 months 5 days ago - 10 months 5 days ago #1 by Stefan Hirsch
how import dll functions with ref intern was created by Stefan Hirsch
Hi all,

how can I import dll function with REF as parameter?
_DLL FUNC MyFunction( param1 REF WORD ) AS DWORD PASCAL:MyDll.MyFunction

In X#/VO this compiles without error message. With X#/Core I get 'error XS0214: Pointers and fixed size buffers may only be used in an unsafe context'

Background: I try to eliminate VO/Vulcan dependancies.

Regards,
Stefan
Last edit: 10 months 5 days ago by Stefan Hirsch.

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10 months 5 days ago #2 by Chris Pyrgas
Replied by Chris Pyrgas on topic how import dll functions with ref intern
Hi Stefan,

This declaration should compile fine in Core, too. Are you sure the error is pointing in that declaration, or maybe it's reported in the code that calls it? Or in some other function?

Chris

XSharp Development Team
chris(at)xsharp.eu

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9 months 4 weeks ago #3 by Guy DEPREZ
Replied by Guy DEPREZ on topic how import dll functions with ref intern
With the code below, same error X0214 in X#/Core...

[DllImport("user32.dll")];
STATIC METHOD ShowWindow(hWnd AS PTR, nCmdShow AS INT) AS LOGIC PASCAL

Guy

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9 months 4 weeks ago #4 by Guy DEPREZ
Replied by Guy DEPREZ on topic how import dll functions with ref intern
Problem solved: PTR -> IntPTR

[DllImport("user32.dll")];
STATIC METHOD ShowWindow(hWnd AS IntPTR, nCmdShow AS INT) AS LOGIC PASCAL

Guy

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9 months 4 weeks ago #5 by Chris Pyrgas
Replied by Chris Pyrgas on topic how import dll functions with ref intern
Hi Guy,

Just to explain, this is because the "PTR" type is a VO compatibility thing and it is not available in the Core dialect, only in the vulcan, VO and similar X# dialect settings. In Core, IntPtr can be used instead of PTR, as you already found!

Chris

XSharp Development Team
chris(at)xsharp.eu

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