獲取盤符，並對盤符進行循環類型監測

MFC下寫了段獲取盤符的代碼，現筆記如下：

採用一下函數

DWORD WINAPI GetLogicalDriveStrings(
  __in          DWORD nBufferLength,
  __out         LPTSTR lpBuffer
);

將系統中有效的盤符以字符串的形式存在buffer中：

UINT WINAPI GetDriveType(
  __in          LPCTSTR lpRootPathName
);

確定一個盤符的類型，有removable, fixed, CD-ROM, RAM disk, or network drive.

Return code	Description
DRIVE_UNKNOWN	The drive type cannot be determined.
DRIVE_NO_ROOT_DIR	The root path is invalid; for example, there is no volume is mounted at the path.
DRIVE_REMOVABLE	The drive has removable media; for example, a floppy drive, thumb drive, or flash card reader.
DRIVE_FIXED	The drive has fixed media; for example, a hard drive or flash drive.
DRIVE_REMOTE	The drive is a remote (network) drive.
DRIVE_CDROM	The drive is a CD-ROM drive.
DRIVE_RAMDISK	The drive is a RAM disk.

函數代碼如下：

int CMarsTestDlg::SearchDrive() 
{   
 UINT DriveNumber = NULL;
 TCHAR DriveBuffer[100];
 TCHAR *pDriveName = NULL;
 DWORD DriverLength = sizeof(DriveBuffer);
 int iResult = GetLogicalDriveStrings(DriverLength,(LPTSTR)DriveBuffer);
 if(iResult == 0)
 {
  MessageBox( TEXT("獲取盤符出錯!"), TEXT("Intretech"), MB_OK);
  return 0;
 }
 pDriveName = DriveBuffer;
 while(*pDriveName != NULL)
 {
  DriveNumber = GetDriveType((LPCTSTR)pDriveName);
  if(DriveNumber == DRIVE_REMOVABLE)
  {
   //監測到可移動盤的代碼
  }
  pDriveName += wcslen(pDriveName) + 1;
 }
 return 0;
 
}