loadlibraryexu.pas

DelphiWin32核心API参考光盘内容.是学习书籍中的源码,便于学习.

unit LoadLibraryExU;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Image1: TImage;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
var
   hMod: THandle;           // a handle to the DLL
   BitmapHandle: HBitmap;   // a handle to a bitmap
begin
   {explicitely load the DLL}
   hMod := LoadLibraryEx('BitmapDll.DLL', 0, 0);
   if (hMod = 0) then Exit;

   {retrieve a handle to the bitmap stored in the DLL}
   BitmapHandle := LoadBitmap(hMod, 'BITMAPEXAMPLE');
   If (Bitmaphandle = 0)then Exit;

   {assign the bitmap to the TImage component}
   Image1.Picture.Bitmap.Handle := BitmapHandle;

   {unload the DLL}
   FreeLibrary(hMod);
end;

end.