How can I get read information from my harddisk in QT

[yanyuyu001]

I didn't find any api in QT to read information from my harddisk,so I use windows api GetVolumeInformation.but it return false.get the harddisk information failed.Following codes is how I use the api.
@LPCTSTR lpRootPathName = L"c:\";
LPWSTR volumeNameBuffer;
DWORD nVolumeNameSize = 12;
DWORD VolumeSerialNumber;
DWORD MaximumComponentLength;
LPWSTR fileSystemNameBuffer;
DWORD nFileSystemNameSize = 10;
DWORD FileSystemFlags;
if(!GetVolumeInformation(lpRootPathName,
volumeNameBuffer, nVolumeNameSize,
&VolumeSerialNumber, &MaximumComponentLength,
&FileSystemFlags,
fileSystemNameBuffer, nFileSystemNameSize))
return false;@

[SGaist]

Hi,

depending on your version of Qt you could use QSystemStorage from QtMobility.

Anyway nVolumeNameSize and nFileSystemNameSize are looking arbitrary short. A better place for Windows API question is the MSDN forum

[yanyuyu001]

I find the problem.I rewrite the code as:
@
LPCTSTR lpRootPathName = L"c:\"; // 取C盘
LPTSTR volumeNameBuffer = new TCHAR[12]; // 磁盘卷标
DWORD nVolumeNameSize = 12; // 卷标的字符串长度
DWORD VolumeSerialNumber; // 硬盘序列号
DWORD MaximumComponentLength; // 最大的文件长度
LPTSTR fileSystemNameBuffer = new TCHAR[10]; // 存储所在盘符的分区类型的长指针变量
DWORD nFileSystemNameSize = 10; // 分区类型的长指针变量所指向的字符串长度
DWORD FileSystemFlags; // 文件系统的一此标志
@
I return what I want.But I don't know why.

[SGaist]

Then you should re-read the documentation of "GetVolumeInformation":http://msdn.microsoft.com/en-us/library/windows/desktop/aa364993(v=vs.85).aspx