Windows读取文件的版本信息

bool QueryValue(const std::string& ValueName, const std::string& szModuleName, std::string& RetStr)
{
bool bSuccess = FALSE;
BYTE*  m_lpVersionData = NULL;
DWORD   m_dwLangCharset = 0;
CHAR *tmpstr = NULL;

do
{
if (!ValueName.size() || !szModuleName.size())
{
break;
}

DWORD dwHandle;
DWORD dwDataSize = GetFileVersionInfoSizeA((LPCSTR)szModuleName.c_str(), &dwHandle);

if (dwDataSize == 0)
{
break;
}

m_lpVersionData = new (std::nothrow) BYTE[dwDataSize];

if (NULL == m_lpVersionData)
{
break;
}

//GetFileVersionInfoA失败则返回0，m_lpVersionData用于装载文件的版本信息
if (!GetFileVersionInfoA((LPCSTR)szModuleName.c_str(), dwHandle, dwDataSize, (void*)m_lpVersionData))
{
break;
}

UINT nQuerySize;
DWORD* pTransTable;

//VerQueryValue这个函数用于从版本资源中获取信息，失败返回0。调用这个函数前，必须先用GetFileVersionInfo函数获取版本资源信息。这个函数会检查资源信息，并将需要的数据复制到一个缓冲区里。pTransTable时要装载数据的地址
if (!VerQueryValueA(m_lpVersionData, "\\VarFileInfo\\Translation", (void **)&pTransTable, &nQuerySize))
{
break;
}
//MAKELONG 将两个16位的数联合成一个无符号的32位数
m_dwLangCharset = MAKELONG(HIWORD(pTransTable[0]), LOWORD(pTransTable[0]));

if (m_lpVersionData == NULL)
{
break;
}

tmpstr = new (std::nothrow) CHAR[128];

if (NULL == tmpstr)
{
break;
}

sprintf_s(tmpstr, 128, "\\StringFileInfo\\%08lx\\%s", m_dwLangCharset, ValueName.c_str());
LPVOID lpData;

// 调用此函数查询前需要先依次调用函数GetFileVersionInfoSize和GetFileVersionInfo。"\StringFileInfo\...." 获取文件的字串信息
if (VerQueryValueA((void *)m_lpVersionData, tmpstr, &lpData, &nQuerySize))
{
RetStr = (char*)lpData;
}

bSuccess = TRUE;
} while (FALSE);

if (m_lpVersionData)
{
delete[] m_lpVersionData;
m_lpVersionData = NULL;
}

if (tmpstr)
{
delete[] tmpstr;
tmpstr = NULL;
}

return bSuccess;
}