| Код |
//---------------------------------------------------------------------------
#ifndef Unit1H
#define Unit1H
//---------------------------------------------------------------------------
#include <Classes.hpp>
#include <Controls.hpp>
#include <StdCtrls.hpp>
#include <Forms.hpp>
//---------------------------------------------------------------------------
class TForm1 : public TForm
{
__published: // IDE-managed Components
void __fastcall FormCreate(TObject *Sender);
private: // User declarations
void __fastcall WMDeviceChange(TMessage& Msg);
BEGIN_MESSAGE_MAP
VCL_MESSAGE_HANDLER(WM_DEVICECHANGE, TMessage, WMDeviceChange)
END_MESSAGE_MAP(TForm)
public: // User declarations
__fastcall TForm1(TComponent* Owner);
bool __fastcall RegisterDeviceInterfaceToHwnd(GUID InterfaceClassGuid, HWND hWnd, HDEVNOTIFY *hDeviceNotify);
};
//---------------------------------------------------------------------------
extern PACKAGE TForm1 *Form1;
//---------------------------------------------------------------------------
#endif
|
и
| Код |
//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop
#include <Dbt.h>
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
GUID WceusbshGUID = {0x25dbce51,0x6c8f,0x4a72,0x8a,0x6d,0xb5,0x4c,0x2b,0x4f,0xc8,0x35}; // для PnP
HDEVNOTIFY hDeviceNotify;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::WMDeviceChange(TMessage &Msg)
{
if(Msg.WParam == DBT_DEVICEARRIVAL) ShowMessage("Воткнули");
if(Msg.WParam == DBT_DEVICEREMOVECOMPLETE) ShowMessage("Выткнули");
}
void __fastcall TForm1::FormCreate(TObject *Sender)
{
RegisterDeviceInterfaceToHwnd(WceusbshGUID, Form1->Handle, &hDeviceNotify);
}
//---------------------------------------------------------------------------
bool __fastcall TForm1::RegisterDeviceInterfaceToHwnd(GUID InterfaceClassGuid, HWND hWnd, HDEVNOTIFY *hDeviceNotify)
{
DEV_BROADCAST_DEVICEINTERFACE NotificationFilter;
ZeroMemory(&NotificationFilter, sizeof(NotificationFilter) );
NotificationFilter.dbcc_size = sizeof(DEV_BROADCAST_DEVICEINTERFACE);
NotificationFilter.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
NotificationFilter.dbcc_classguid = InterfaceClassGuid;
*hDeviceNotify = RegisterDeviceNotification(hWnd, &NotificationFilter, DEVICE_NOTIFY_WINDOW_HANDLE);
if(NULL == *hDeviceNotify) return FALSE;
return TRUE;
}
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