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Вызвать процедуру из DLL


//  Call DLL Program  (Normal Application Project) 
//  This example calls a Quick Report within a DLL. 
//  Author: Michael Casse. 
//  18-12-2001. 

unit uMain; 

interface 

uses 
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, 
  StdCtrls, Buttons; 

type 
  TForm1 = class(TForm) 
    btnClose: TBitBtn; 
    btnReport: TBitBtn; 
    procedure btnReportClick(Sender: TObject); 
  private 
    { Private declarations } 
  public 
    { Public declarations } 
  end; 

var 
  Form1: TForm1; 

implementation 

{$R *.DFM} 

procedure TForm1.btnReportClick(Sender: TObject); 
var 
  LibHandle: THandle; 
  fDisplaySampleReport: procedure; 
  begin 
    LibHandle := LoadLibrary('Report.dll'); 
    if LibHandle = 0 then 
      raise Exception.Create('Unable to Load DLL...') 
    else 
    begin 
      try @fDisplaySampleReport := GetProcAddress(LibHandle, 'DisplaySampleReport'); 
        if @fDisplaySampleReport <> nil then 
          fDisplaySampleReport; // Invoke the Procedure within the DLL 
      except 
        on E: Exception do 
          ShowMessage('Exception error: ' + E.Message); 
      end; 
    end; 
    FreeLibrary(LibHandle); // Free Memory Allocated for the DLL 
  end; 

  end. 

  //////////////////////////////////////////////// 
  // DLL Project 

library Report; 

uses  SysUtils, Classes, 
      uReport in 'uReport.pas' {Form1}; 

procedure DisplaySampleReport; 
begin 
  Form1 := TForm1.Create(nil); 
  try 
    Form1.QuickRep1.Preview; 
  finally 
    Form1.Free; 
  end; 
end; 

exports  DisplaySampleReport; 

end.

           




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