[StructLayout(LayoutKind.Sequential)]
public struct DEV_BROADCAST_VOLUME
{
public int dbcv_size;
public int dbcv_devicetype;
public int dbcv_reserved;
public int dbcv_unitmask;
} protected override void WndProc(ref Message m)
{
// 可以在dbt.h和winuser.h中找到这些定义
// 发生设备变动
const int WM_DEVICECHANGE = 0x0219;
// 系统检测到一个新设备
const int DBT_DEVICEARRIVAL = 0x8000;
// 系统完成移除一个设备
const int DBT_DEVICEREMOVECOMPLETE = 0x8001;
// 逻辑卷标
const int DBT_DEVTYP_VOLUME = 0x00000002; switch (m.Msg)
{
case WM_DEVICECHANGE:
switch (m.WParam.ToInt32())
{
case DBT_DEVICEARRIVAL:
int devType = Marshal.ReadInt32(m.LParam, 4);
if (devType == DBT_DEVTYP_VOLUME)
{
DEV_BROADCAST_VOLUME vol;
vol = (DEV_BROADCAST_VOLUME)Marshal.PtrToStructure(
m.LParam, typeof(DEV_BROADCAST_VOLUME)); MessageBox.Show(vol.dbcv_unitmask.ToString("x"));
}
break;
case DBT_DEVICEREMOVECOMPLETE:
MessageBox.Show("Removal");
break;
}
break;
}
//we detect the media arrival event
base.WndProc(ref m);
}
解决方案 »
免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货