How to - string in DLL

**WojTec**

There is another problem - compatibility Ansii/Unicode.
DLL is compiled with D2010, it uses unit with string type.
In API unit I strings declared as AnsiString:

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Delphi-Quellcode:

			S: AnsiString;

S := FuncReturnsString();

StrLCopy(lpBuffer, PAnsiChar(AnsiString(S)), nSize) // second typecast is from old version

If both DLL and app are compiled in Ansii compiler (D7) - it working, if in Unicode (D2010) - also working. Of one compiled in Ansii and second in Unicode, then raises invalid pionter operation exception, but buffers has correct data. I don't understand. What I'm doing wrong?

**jaenicke**

I think this is a problem with the size parameter.

You always have to have in mind that one character is one byte in Delphi 7 and two bytes in Delphi 2010.

How does the code for reserving the memory, ... look like?

**WojTec**

Hm, my functions working as in example on 1st page in this thread, size is length of S, in Ansii should be S length, but in Unicode length * 2 if we talking about bytes nor string length, but the same code working if both EXE and DLL are Ansii OR Unicode. So, what I should to do?

How to - string in DLL

Re: How to - string in DLL

AW: How to - string in DLL

Re: How to - string in DLL

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jaenicke Registriert seit: 10. Jun 2003 Ort: Berlin 9.580 Beiträge Delphi 11 Alexandria	#22 AW: How to - string in DLL 22. Jun 2011, 17:36 I think this is a problem with the size parameter. You always have to have in mind that one character is one byte in Delphi 7 and two bytes in Delphi 2010. How does the code for reserving the memory, ... look like? Sebastian Jänicke Alle eigenen Projekte sind eingestellt, ebenso meine Homepage, Downloadlinks usw. im Forum bleiben aktiv!
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WojTec Registriert seit: 17. Mai 2007 480 Beiträge Delphi XE6 Professional	#23 Re: How to - string in DLL 22. Jun 2011, 20:28 Hm, my functions working as in example on 1st page in this thread, size is length of S, in Ansii should be S length, but in Unicode length * 2 if we talking about bytes nor string length, but the same code working if both EXE and DLL are Ansii OR Unicode. So, what I should to do?
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