给DBGrid添加鼠标滚动事件

　2006-02-04 13:55:06　来源：WEB开发网　闂侀潧妫撮幏锟�

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核心提示：unit Unit1;interfaceusesWindows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, DB, ADODB, Grids, DBGrids;type TForm1 = class(TForm)

unit Unit1;

interface

uses
　Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, DB, ADODB, Grids, DBGrids;

type
　 TForm1 = class(TForm)
　　DBGrid1: TDBGrid;
　　ADOTable1: TADOTable;
　　DataSource1: TDataSource;
　　PRocedure FormCreate(Sender: TObject);
　private
　 Procedure OnMouseWheel(Var Msg :TMsg;var Handled:Boolean);
　　{ Private declarations }
　public
　　{ Public declarations }
　end;

var
　Form1: TForm1;

implementation

{$R *.dfm}
//------------------------------------------------------------------------------
Procedure TForm1.OnMouseWheel(Var Msg :TMsg;var Handled:Boolean);
begin
　if Msg.message = WM_MouseWheel then
　begin
　　if Msg.wParam > 0 then
　　 begin
　　　 if DBGrid1.Focused then
　　　　 SendMessage(DBGrid1.Handle,WM_VSCROLL,SB_PAGEUP,0);
　　 end
　　else
　　 begin
　　　 if DBGrid1.Focused then
　　　　 SendMessage(DBGrid1.Handle,WM_VSCROLL,SB_PAGEDOWN,0);
　　 end;
　　Handled:= True;
　end;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
application.OnMessage:=OnMouseWheel; // 截获鼠标滚动事件
end;