| Код |
library testdll;
{ Important note about DLL memory management: ShareMem must be the
first unit in your library's USES clause AND your project's (select
Project-View Source) USES clause if your DLL exports any procedures or
functions that pass strings as parameters or function results. This
applies to all strings passed to and from your DLL--even those that
are nested in records and classes. ShareMem is the interface unit to
the BORLNDMM.DLL shared memory manager, which must be deployed along
with your DLL. To avoid using BORLNDMM.DLL, pass string information
using PChar or ShortString parameters. }
uses
SysUtils,
Classes,
ShareMem,
ufTSWindow in 'ufTSWindow.pas' {Form4};
{$R *.res}
var
HookDCWindow: TForm4;
procedure HookWMDeviceChange;
begin
if not Assigned(HookDCWindow) then
begin
HookDCWindow := TForm4.Create(nil);
HookDCWindow.Show;
//
end;
end;
procedure UnHookWMDeviceChange;
begin
if Assigned(HookDCWindow) then
begin
FreeAndNil(HookDCWindow);
//
end;
end;
exports HookWMDeviceChange, UnHookWMDeviceChange;
begin
end.
|
| Код |
unit ufTSWindow;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs;
type
TForm4 = class(TForm)
private
procedure WMDeviceChange(var Message: TMessage); message WM_DEVICECHANGE;
end;
var
Form4: TForm4;
unique_number_in: boolean=false;
unique_number_out: boolean=false;
count_of_7_message: byte=0;
implementation
{$R *.dfm}
{ TForm4 }
procedure TForm4.WMDeviceChange(var Message: TMessage);
begin
if (Message.wParam=7) then inc(count_of_7_message);
if (Message.wParam=32772) then unique_number_out:=true;
if (Message.wParam=32768) then unique_number_in:=true;
if (unique_number_out) and (count_of_7_message=3) then
begin
unique_number_out:=false;
count_of_7_message:=0;
ShowMessage('Флешка была отключена');
end;
if (unique_number_in) and (count_of_7_message=6) then
begin
unique_number_in:=false;
count_of_7_message:=0;
ShowMessage('Флешка была включена');
end;
// Memo1.Lines.Add('Пришло сообщение с кодом '+IntToStr(Message.wParam));
Inherited;
end;
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Что-то вроде, не проверял т.к. ничего флешового нету под рукой.
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