Форум: "WinAPI";
Текущий архив: 2008.06.08;
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← →
apic ©   (2007-09-27 15:14) [0]

Как программно отключить usb flashdisk

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← →
Rouse_ ©   (2007-09-27 15:27) [1]

////////////////////////////////////////////////////////////////////////////////
//
//  ****************************************************************************
//  * Unit Name : USBStateChange
//  * Purpose   : Пример включения.отключения USB накопителей
//  * Author    : Александр (Rouse_) Багель
//  * Copyright : © Fangorn Wizards Lab 1998 - 2007
//  * Version   : 1.00
//  * Home Page : http://rouse.drkb.ru
//  ****************************************************************************
//

unit USBStateChange;

interface

uses
 Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,
 Dialogs, StdCtrls;

type
 TForm6 = class(TForm)
   btnEnable: TButton;
   btnDisable: TButton;
   procedure btnEnableClick(Sender: TObject);
   procedure btnDisableClick(Sender: TObject);
 end;

var
 Form6: TForm6;

implementation

{$R *.dfm}

type
 PSP_CLASSINSTALL_HEADER = ^SP_CLASSINSTALL_HEADER;
 SP_CLASSINSTALL_HEADER = record
   cbSize: DWORD;
   InstallFunction: Cardinal;
 end;

 PSP_PROPCHANGE_PARAMS = ^SP_PROPCHANGE_PARAMS;
 SP_PROPCHANGE_PARAMS = record
   ClassInstallHeader: SP_CLASSINSTALL_HEADER;
   StateChange: DWORD;
   Scope: DWORD;
   HwProfile: DWORD;
 end;

 PSP_DEVINFO_DATA = ^SP_DEVINFO_DATA;
 SP_DEVINFO_DATA = record
   cbSize: DWORD;
   ClassGuid: TGUID;
   DevInst: DWORD;
   Reserved: Longint;
 end;

 function SetupDiGetClassDevs(const ClassGuid: PGUID; Enumerator: PChar;
   hwndParent: HWND; Flags: DWORD): DWORD; stdcall;
   external "Setupapi.dll" name "SetupDiGetClassDevsA";

 function SetupDiDestroyDeviceInfoList(DeviceInfoSet: DWORD): BOOL; stdcall;
   external "Setupapi.dll";

 function SetupDiEnumDeviceInfo(DeviceInfoSet: DWORD; MemberIndex: DWORD;
   DeviceInfoData: PSP_DEVINFO_DATA): BOOL; stdcall;
   external "Setupapi.dll";

 function SetupDiCallClassInstaller(InstallFunction: DWORD;
   DeviceInfoSet: DWORD; DeviceInfoData: PSP_DEVINFO_DATA): BOOL; stdcall;
   external "setupapi.dll";

 function SetupDiGetDeviceRegistryProperty(DeviceInfoSet: DWORD;
   DeviceInfoData: PSP_DEVINFO_DATA; Propertys: DWORD; PropertyRegDataType: PWORD;
   PropertyBuffer: PByte; PropertyBufferSize: DWORD; RequiredSize: PWORD): BOOL; stdcall;
   external "Setupapi.dll" name "SetupDiGetDeviceRegistryPropertyA";

 function SetupDiSetClassInstallParams(DeviceInfoSet: DWORD;
   DeviceInfoData: PSP_DEVINFO_DATA; ClassInstallParams: PSP_CLASSINSTALL_HEADER;
   ClassInstallParamsSize: DWORD): BOOL; stdcall;
   external "setupapi.dll" name "SetupDiSetClassInstallParamsA";

const
 DICS_ENABLE = $00000001;
 DICS_DISABLE = $00000002;
 DIF_PROPERTYCHANGE = $00000012;
 DICS_FLAG_GLOBAL = $00000001;
 DIGCF_PRESENT = $00000002;
 SPDRP_COMPATIBLEIDS = $00000002;

 DISK_GUID: TGUID = "{4D36E967-E325-11CE-BFC1-08002BE10318}";

function ChangeDeviceState(AState: DWORD): Boolean;
var
 pcp: SP_PROPCHANGE_PARAMS;
 DevInfoData: SP_DEVINFO_DATA;
 hDevInfo1:  DWORD;
 I, DataT, Buffersize: DWORD;
 Buffer: PAnsiChar;
begin
 Result := False;
 pcp.ClassInstallHeader.cbSize := sizeof(SP_CLASSINSTALL_HEADER);
 pcp.ClassInstallHeader.InstallFunction := DIF_PROPERTYCHANGE;
 pcp.StateChange := AState;
 pcp.Scope := DICS_FLAG_GLOBAL;
 pcp.HwProfile := 0;
 hDevInfo1 := SetupDiGetClassDevs(@DISK_GUID, nil, HWND(nil), DIGCF_PRESENT);
 try
   DevInfoData.cbSize := sizeof(SP_DEVINFO_DATA);
   I := 0;
   Buffersize := 500;
   GetMem(Buffer, Buffersize);
   try
     while SetupDiEnumDeviceInfo(hDevInfo1, I, @DevInfoData) do
     begin
       SetupDiGetDeviceRegistryProperty(hDevInfo1, @DevInfoData,
         SPDRP_COMPATIBLEIDS, @DataT, PByte(Buffer), Buffersize, nil);
       if buffer = "USBSTOR\Disk" then
       begin
         if not SetupDiSetClassInstallParams(hDevInfo1,
           @DevInfoData, PSP_CLASSINSTALL_HEADER(@pcp), SizeOf(pcp)) then Exit;
         if not SetupDiCallClassInstaller(
           DIF_PROPERTYCHANGE, hDevInfo1, @DevInfoData) then Exit;
         Result := True;
       end;
       Inc(I);
     end;
   finally
     FreeMem(Buffer);
   end;
 finally
   SetupDiDestroyDeviceInfoList(hDevInfo1);
 end;
end;

procedure TForm6.btnEnableClick(Sender: TObject);
begin
 if ChangeDeviceState(DICS_ENABLE) then
   ShowMessage("Устройство включено");
end;

procedure TForm6.btnDisableClick(Sender: TObject);
begin
 if ChangeDeviceState(DICS_DISABLE) then
   ShowMessage("Устройство отключено");
end;

end.

---

← →
apic ©   (2007-09-27 15:51) [2]

Ты просто монстр, в хорошем смысле слова! Огромное тебе спасибо - это то, что мне нужно!

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Форум: "WinAPI";
Текущий архив: 2008.06.08;
Скачать: [xml.tar.bz2];

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