C 識別U盤和碟符

using system;

using system.collections.generic;
using system.componentmodel;
using system.data;
using system.drawing;
using system.text;
using system.io;
using system.windows.forms;
using system.runtime.interopservices;
namespace usb
public const int wm_devicechange = 0x219;
public const int dbt_devicearrival = 0x8000;
public const int dbt_configchangecanceled = 0x0019;
public const int dbt_configchanged = 0x0018;
public const int dbt_customevent = 0x8006;
public const int dbt_devicequeryremove = 0x8001;
public const int dbt_devicequeryremovefailed = 0x8002;
public const int dbt_deviceremovecomplete = 0x8004;
public const int dbt_deviceremovepending = 0x8003;
public const int dbt_devicetypespecific = 0x8005;
public const int dbt_devnodes_changed = 0x0007;
public const int dbt_querychangeconfig = 0x0017;
public const int dbt_userdefined = 0xffff;
// 邏輯卷標
public const int dbt_devtyp_volume = 0x00000002;
// private lockscreen ls = new lockscreen();
public string id = "";
public string value;
public string item;
[structlayout(layoutkind.sequential)]
public struct dev_broadcast_volume
protected override void wndproc(ref message m)
int devtype = marshal.readint32(m.lparam, 4);
if (devtype == dbt_devtyp_volume)
}this.label1.text = this.text;
}break;
case dbt_configchangecanceled:
break;
case dbt_configchanged:
break;
case dbt_customevent:
break;
case dbt_devicequeryremove:
break;
case dbt_devicequeryremovefailed:
break;
case dbt_deviceremovecomplete: //u盤解除安裝
driveinfo i = driveinfo.getdrives();
foreach (driveinfo drinfo in i)
this.label1.text += this.text;
// messagebox.show("u盤已經解除安裝", "資訊提示", messageboxbuttons.ok, messageboxicon.information);
}break;
case dbt_deviceremovepending:
break;
case dbt_devicetypespecific:
break;
case dbt_devnodes_changed:
break;
case dbt_querychangeconfig:
break;
case dbt_userdefined:
break;
default:
break;}}
}catch (exception ex)
base.wndproc(ref m);
}private void usb_load(object sender, eventargs e)
public string io(string ff)
return value;
}private void timer1_tick(object sender, eventargs e)
}}

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