如何判断键盘按下的是 'enter','pageup','pagedown'键(100分)

如何判断键盘按下的是 'enter','pageup','pagedown'键，即这几个键的表示方法。
（如：空格键可用Key=VK_Space 判断，但Key＝Vk_Enter 为什么就出错？）

key=13 enter键
key=33 pageup键
key=34 pagedown键

你把key值showemassage出来就知道是什么了。

key值showemassage 如何实现？

onkeydown里加：
showmessage(key);
用以查看键值；

key=13 enter键
key=33 pageup键
key=34 pagedown键

去下载keyinfo,很简单实用的东西！

procedure TZydj_DjForm.FormKeyDown(Sender: TObject
var Key: Word;
Shift: TShiftState);
procedure Click(aDBNavButton: TwwNavButton);
begin
with aDBNavButton do if Enabled then Click;
Key:=0;
end;
begin
if Zy_DataModule.DataSource_Zydjb.DataSet.State in [dsInsert,dsEdit] then
case Key of
VK_ESCAPE (*#27*): Click(wwDBNavigator1Post);
$43 (*C*): if Shift = [ssCtrl] then Click(wwDBNavigator1Cancel);
end
else begin
case Key of
VK_PRIOR (*#33*): Click(wwDBNavigator1PriorPage);
VK_NEXT (*#34*): Click(wwDBNavigator1NextPage);
VK_INSERT(*#45*): Click(wwDBNavigator1Insert);
VK_DELETE(*#46*): Click(wwDBNavigator1Delete);
VK_HOME (*#36*): Click(wwDBNavigator1First);
VK_UP (*#38*): Click(wwDBNavigator1Prior);
VK_DOWN (*#40*): Click(wwDBNavigator1Next);
VK_LEFT (*#37*): Click(wwDBNavigator1Prior);
VK_RIGHT (*#39*): Click(wwDBNavigator1Next);
VK_END (*#35*): Click(wwDBNavigator1Last);
end;
if Shift = [ssCtrl] then
case Key of
$51 (*Q*): Click(wwDBNavigator1Button4)
//查询
$58 (*X*): Click(wwDBNavigator1Button1)
//退出
end;
end;
end;

Enter你可以用 "#13 "表示
pageup和pagedown也类似,在key值前加"#"号就可以了.

unit Unit1; [][][]
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;

type
TForm1 = class(TForm)
Label1: TLabel;
procedure FormShortCut(var Msg: TWMKey
var Handled: Boolean);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormShortCut(var Msg: TWMKey
var Handled: Boolean);
begin
case msg.CharCode of
13:label1.caption:='you pressed Enter';
33:label1.caption:='you pressed PageUp';
34:label1.caption:='you pressed PageDown';
end;
end;

end.

注意：回车键对应的值为VK_RETURN，而不是你说的VK_ENTER

数字键旁的回车和主键盘的回车代码是不一样的。

看看Windows SDK帮助吧,里面有所有按键VK值列表.

我的天，这个问题能回答的这么细致，youli还不散分？？
我想答都无从下手了