vc获取U盘的盘符和插拔消息

UINT DiskType;
 size_t   szAllDriveStrings = GetLogicalDriveStrings(0,NULL);
char *pDriveStrings = new   char[szAllDriveStrings + sizeof(_T( " "))];
GetLogicalDriveStrings(szAllDriveStrings,pDriveStrings);
size_t   szDriveString = strlen(pDriveStrings);
while(szDriveString > 0)
{
  AfxMessageBox(pDriveStrings);
  DiskType=GetDriveType(pDriveStrings);
  switch(DiskType)
  {
  case DRIVE_NO_ROOT_DIR:
   return;
  case DRIVE_REMOVABLE:
   ::AfxMessageBox( "移动存储设备 ");
   break;
  case DRIVE_FIXED:
   ::AfxMessageBox( "固定硬盘驱动器 ");
   break;
  case DRIVE_REMOTE:
   ::AfxMessageBox( "这是网络驱动器 ");
   break;
  case DRIVE_CDROM:
   ::AfxMessageBox( "这是光盘驱动器 ");
   break;

  }

  pDriveStrings += szDriveString + 1;
  szDriveString = strlen(pDriveStrings);
}

映射消息响应函数
ON_WM_DEVICECHANGE(OnDeviceChange)

加入
afx_msg void OnDeviceChange(UINT nEventType, DWORD dwData);


void CGggfDlg::OnDeviceChange(UINT nEventType, DWORD dwData)
{
    if( nEventType ==32768)
    {
        MessageBox(_T("U盘插入"));
    }

    else if(nEventType ==32772)
    {
        MessageBox(_T("U盘拔出"));
    }
}


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获取U盘符

    CString str = _T("z:\\");
    for( char ch = 'z'; ch >='c'; ch--)
    {
        str.SetAt(0,ch);
        UINT type = GetDriveType(str);
        if(DRIVE_REMOVABLE == type)
        {
            AfxMessageBox(str);
        }
    }