Re: Passing a string to a DLL procedure with PChar

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#597

From: Emmanuel Derriey
Date: Thu, 04 Mar 1999 00:00

27 lines
1852 bytes

Hi !
I think that your procedure is :
procedure ProcedureInsideTheDLL (Input:String; var Output:String);
and not
procedure ProcedureInsideTheDLL (Input:String; Output:String);
Nevertheless, you should use PChar arguments ; you must consider that the
PChar are allocated by the caller.
Example :
procedure ProcedureInsideTheDLL (PcharInput:PChar; PCharOutput:PChar);    //
Don't need the 'var' keyword because it's a allocated pointer
var
  Input : string;
  Output : string
begin
  Input := string(PCharInput);    // string and PChar are compatible
// Do something
  PCharOutput := PChar(Output);
end;
It should work if enought char are allocated in PCharOutput !!! Else : BOOM
!
Hope it will help you...

--
Emmanuel Derriey.
Windows Software Developer.

e-mail : ederriey@at-iris.com

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From: "Emmanuel Derriey" <jplabbad@aibtp.alienor.fr>
Subject: Re: Passing a string to a DLL procedure with PChar
Date: 1999/03/04
Message-ID: <7blh68$646$1@ai.alienor.fr>
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