鉤子 HOOK 機制的使用

2021-05-22 21:24:12 字數 1899 閱讀 8384

wh_mouse,@gethookinfo,hinstance,getcurrentthreadid

());

mymousehook.callbackfun :=callbackf;

mymousehook.isrun:=not mymousehook.isrun;

end;

end;

procedure uninstallmousehook(); stdcall;

begin

if mymousehook.isrun then

begin

unhookwindowshookex(mymousehook.hook);

mymousehook.callbackfun :=nil;

mymousehook.isrun:=not mymousehook.isrun;

end;

end;

procedure dllentrypoint(dwreason:dword); 

begin

case dwreason of

dll_process_attach:begin

mymousehook.isrun:=false;

end;

dll_process_detach:;

dll_thread_attach:;

dll_thread_detach:;

end;

end;

exports

installmousehook,

uninstallmousehook;

begin

dllproc := @dllentrypoint;

dllentrypoint(dll_process_attach);

end.

unit unit1;

inte***ce

uses

windows, messages, sysutils, variants, classes, graphics, controls, forms,

dialogs, stdctrls;

type

tcallbackfun=procedure(info:pchar);

type

tform1 = class(tform)

memo: tmemo;

button1: tbutton;

procedure formdestroy(sender: tobject);

procedure button1click(sender: tobject);

private

public

end;

var form1: tform1;

implementation

procedure installmousehook(callbackf:tcallbackfun); stdcall;external 'mousehook.dll';

procedure uninstallmousehook(); stdcall;external 'mousehook.dll';

procedure addinfo(info:pchar);

begin

end;

//2、安裝鉤子

procedure tform1.button1click(sender: tobject);

begin

installmousehook(addinfo);

end;

//3、一定不要忘了卸裝鉤子

procedure tform1.formdestroy(sender: tobject);

begin

uninstallmousehook();

end;

end.

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