鉤子 HOOK 機制的使用

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.

鉤子 HOOK 機制的使用

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