Галактика в вопросах и ответах

Код: Выделить всё

library checkKontr;

{ Important note about DLL memory management: ShareMem must be the
  first unit in your library's USES clause AND your project's (select
  Project-View Source) USES clause if your DLL exports any procedures or
  functions that pass strings as parameters or function results. This
  applies to all strings passed to and from your DLL--even those that
  are nested in records and classes. ShareMem is the interface unit to
  the BORLNDMM.DLL shared memory manager, which must be deployed along
  with your DLL. To avoid using BORLNDMM.DLL, pass string information
  using PChar or ShortString parameters. }

uses
  SysUtils,
  Classes,
  Dialogs;

{$R *.res}

Function UMNOG_NA_DVA(var x:integer):integer;
export;
stdcall;
begin
  x:=x*2;
  UMNOG_NA_DVA:=1;
end;

exports UMNOG_NA_DVA;
begin
end.

Код: Выделить всё

Function UMNOG_NA_DVA(LongInt):LongInt; external 'CHECKKONTR.dll#UMNOG_NA_DVA';

interface  for_dll 'Проверка функций работы с DLL';
create view
var num1:LongInt;
    num2:LongInt;
as select * from katmc;

screen dll_call;
fields
  num1,noprotect;
  num2;
buttons
  cmButton1;
<<
  x = .@@@@@@@@@@@   x*2 = .@@@@@@@@@@@@@@@@
  <.Вычислить.>
>>
end; //screen

HandleEvent
  Cmbutton1:{
          Message(string(num1)+'*2='+string(UMNOG_NA_DVA(num1)))
  };
end; //hanlde
end. //interface

Код: Выделить всё

 Runtime error 216 (rtl: попытка обращения к неверному дескриптору) in CHECKKONTR.dll at 0004c626

Код: Выделить всё

library CheckKontr;

  function UMNOG_NA_DVA(X: Integer): Integer;
  begin
    Result := X*2;
  end;

exports
  UMNOG_NA_DVA index 1 name 'MYFUNC';
  
begin
end.

Код: Выделить всё

function Umnog(Integer): Integer; external 'CheckKontr.dll#MYFUNC';

Interface ExamDll;
  create view;


  procedure MyMain;
  begin
    Message('2*3='+String(Umnog(3)),cmOk);
    Abort;
  end;

  HandleEvent
    cmInit:
      MyMain;
 end;
end.

Код: Выделить всё

uses
  AtFields;

Function UMNOG_NA_DVA(F: PField): integer; 
begin 
  F.IPut(F.IValue * 2);

  Result := 1; 
end;
...
exports
  UMNOG_NA_DVA name 'UMNOG_NA_DVA';

...

function UMNOG_NA_DVA(var X: integer): integer; external ...