look 钩子程序的实例 在本程序中建立了两个消息函数,一个用于纪录鼠标、键盘的动作并保存,另一个用于将保存的动作返给系统回放。在Delphi中建立一个工程,在Form1上添加3个按钮用于程序操作。另外再添加一个Edit控件用于验证操作。以下程序在Delphi6.0、Windows98环境下调试通过。 unit Unit1; interface uses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls; type TForm1 = class(TForm) Button1: TButton; Button2: TButton; Button3: TButton; Edit1: TEdit; procedure FormCreate(Sender: TObject); procedure Button1Click(Sender: TObject); procedure Button2Click(Sender: TObject); procedure Button3Click(Sender: TObject); private { private declarations } public { public declarations } end; var Form1: TForm1; EventArr:array[0..1000]of EVENTMSG; EventLog:Integer; PlayLog:Integer; hHook,hPlay:Integer; recOK:Integer; canPlay:Integer; bDelay:Bool; implementation {$R *.DFM} function PlayProc(iCode:Integer;wParam:wParam;lParam:lParam):LRESULT;stdcall; begin canPlay:=1; Result:=0; if iCode < 0 then //必须将消息传递到钩子链的下一个处理程序 Result := CallNextHookEx(hPlay,iCode,wParam,lParam) else if iCode = HC_SYSMODALON then canPlay:=0 else if iCode = HC_SYSMODALOFF then canPlay:=1 else if ((canPlay =1 )and(iCode=HC_GETNEXT)) then begin if bDelay then begin bDelay:=False; Result:=50; end; pEventMSG(lParam)^:=EventArr[PlayLog]; end else if ((canPlay = 1)and(iCode = HC_SKIP))then begin bDelay := True; PlayLog:=PlayLog+1; end; if PlayLog>=EventLog then begin UNHookWindowsHookEx(hPlay); end; end; function HookProc(iCode:Integer;wParam:wParam;lParam:lParam):LRESULT;stdcall; begin recOK:=1; Result:=0; if iCode < 0 then Result := CallNextHookEx(hHook,iCode,wParam,lParam) else if iCode = HC_SYSMODALON then recOK:=0 else if iCode = HC_SYSMODALOFF then recOK:=1 else if ((recOK>0) and (iCode = HC_ACTION)) then begin EventArr[EventLog]:=pEventMSG(lParam)^; EventLog:=EventLog+1; if EventLog>=1000 then begin UnHookWindowsHookEx(hHook); end; end; end; procedure TForm1.FormCreate(Sender: TObject); begin Button1.Caption:='纪录'; Button2.Caption:='停止'; Button3.Caption:='回放'; Button2.Enabled:=False; Button3.Enabled:=False; end; procedure TForm1.Button1Click(Sender: TObject); begin EventLog:=0; //建立键盘、鼠标操作消息纪录链 hHook:=SetwindowsHookEx(WH_JOURNALRECORD,HookProc,HInstance,0); Button2.Enabled:=True; Button1.Enabled:=False; end; procedure TForm1.Button2Click(Sender: TObject); begin UnHookWindowsHookEx(hHook); hHook:=0; Button1.Enabled:=True; Button2.Enabled:=False; Button3.Enabled:=True; end; procedure TForm1.Button3Click(Sender: TObject); begin PlayLog:=0; //建立键盘鼠标操作消息纪录回放链 hPlay:=SetwindowsHookEx(WH_JOURNALPLAYBACK,PlayProc, HInstance,0); Button3.Enabled:=False; end; end. 运行程序,点击“纪录”按钮开始纪录操作,这时你可以在文本控件中输入一些文字,然后点击“停止”按钮停止纪录,再点击“回放”按钮就可以将先前所做的操作回放。在上面的程序中,HookProc是纪录操作的消息函数,每当有鼠标、键盘消息发生时,系统都会调用该函数,消息信息就保存在地址lParam中,PlayProc是消息回放函数,当系统执行消息回放时调用该函数,程序就将先前纪录的消息值返回到lParam指向的区域中,系统就会执行该消息,从而实现了消息回放。
if button= mbLeft then
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钩子程序的实例
在本程序中建立了两个消息函数,一个用于纪录鼠标、键盘的动作并保存,另一个用于将保存的动作返给系统回放。在Delphi中建立一个工程,在Form1上添加3个按钮用于程序操作。另外再添加一个Edit控件用于验证操作。以下程序在Delphi6.0、Windows98环境下调试通过。
unit Unit1;
interface
uses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
Button3: TButton;
Edit1: TEdit;
procedure FormCreate(Sender: TObject);
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
private
{ private declarations }
public
{ public declarations }
end;
var
Form1: TForm1;
EventArr:array[0..1000]of EVENTMSG;
EventLog:Integer;
PlayLog:Integer;
hHook,hPlay:Integer;
recOK:Integer;
canPlay:Integer;
bDelay:Bool;
implementation
{$R *.DFM}
function PlayProc(iCode:Integer;wParam:wParam;lParam:lParam):LRESULT;stdcall;
begin
canPlay:=1;
Result:=0;
if iCode < 0 then //必须将消息传递到钩子链的下一个处理程序
Result := CallNextHookEx(hPlay,iCode,wParam,lParam)
else if iCode = HC_SYSMODALON then canPlay:=0
else if iCode = HC_SYSMODALOFF then canPlay:=1
else if ((canPlay =1 )and(iCode=HC_GETNEXT)) then begin
if bDelay then begin
bDelay:=False;
Result:=50;
end;
pEventMSG(lParam)^:=EventArr[PlayLog];
end
else if ((canPlay = 1)and(iCode = HC_SKIP))then begin
bDelay := True;
PlayLog:=PlayLog+1;
end;
if PlayLog>=EventLog then begin
UNHookWindowsHookEx(hPlay);
end;
end;
function HookProc(iCode:Integer;wParam:wParam;lParam:lParam):LRESULT;stdcall;
begin
recOK:=1;
Result:=0;
if iCode < 0 then
Result := CallNextHookEx(hHook,iCode,wParam,lParam)
else if iCode = HC_SYSMODALON then recOK:=0
else if iCode = HC_SYSMODALOFF then recOK:=1
else if ((recOK>0) and (iCode = HC_ACTION)) then begin
EventArr[EventLog]:=pEventMSG(lParam)^;
EventLog:=EventLog+1;
if EventLog>=1000 then begin
UnHookWindowsHookEx(hHook);
end;
end;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
Button1.Caption:='纪录';
Button2.Caption:='停止';
Button3.Caption:='回放';
Button2.Enabled:=False;
Button3.Enabled:=False;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
EventLog:=0;
//建立键盘、鼠标操作消息纪录链
hHook:=SetwindowsHookEx(WH_JOURNALRECORD,HookProc,HInstance,0);
Button2.Enabled:=True;
Button1.Enabled:=False;
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
UnHookWindowsHookEx(hHook);
hHook:=0;
Button1.Enabled:=True;
Button2.Enabled:=False;
Button3.Enabled:=True;
end;
procedure TForm1.Button3Click(Sender: TObject);
begin
PlayLog:=0;
//建立键盘鼠标操作消息纪录回放链
hPlay:=SetwindowsHookEx(WH_JOURNALPLAYBACK,PlayProc,
HInstance,0);
Button3.Enabled:=False;
end;
end.
运行程序,点击“纪录”按钮开始纪录操作,这时你可以在文本控件中输入一些文字,然后点击“停止”按钮停止纪录,再点击“回放”按钮就可以将先前所做的操作回放。在上面的程序中,HookProc是纪录操作的消息函数,每当有鼠标、键盘消息发生时,系统都会调用该函数,消息信息就保存在地址lParam中,PlayProc是消息回放函数,当系统执行消息回放时调用该函数,程序就将先前纪录的消息值返回到lParam指向的区域中,系统就会执行该消息,从而实现了消息回放。