delphi tedit 透明

unit Unit1;

interface

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

type

TForm1 = class(TForm) edt1: TEdit; procedure FormCreate(Sender: TObject); private fbmp: TBitmap; fbsh: HBRUSH;

protected procedure WndProc(var Messages: TMessage); override; public { Public declarations } end;

var Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject); begin fbmp := TBitmap.Create; fbmp.LoadFromFile('c:\back1.bmp'); fbsh := CreatePatternBrush(fbmp.Handle); end;

procedure TForm1.WndProc(var Messages: TMessage); begin inherited; case Messages.Msg of WM_CTLCOLOREDIT, WM_CTLCOLORSTATIC: if (Messages.LParam=edt1.Handle) and(fbsh <> 0) then begin SetBkMode(Messages.WParam, TRANSPARENT); Messages.Result := fbsh end; end; end;

end.