利用WinAPI（GetFileVersionInfo）获取文件版本信息

【原文：http://blog.csdn.net/fw0124/article/details/6210000】

1)文件版本信息在Windows内部，按照以下格式保存：
例如：
2.10.0.256
->
dwFileVersionMS = 0x0002000A 高4字节 = 2 = 0x0002; 低4字节 = 10 = 0x000A
dwFileVersionLS = 0x00000100 高4字节 = 0 = 0x0000; 低4字节 = 256 = 0x0100

2）请注意要把Version.lib加到Link中。

 bool GetFileVersion
 (
     const std::string& filePath,
     unsigned int &nFileVersionMS,
     unsigned int &nFileVersionLS
 )
 {
     DWORD dwHandle;
     DWORD dwVersionInfoSize;
     dwVersionInfoSize = ::GetFileVersionInfoSize((char*)filePath.c_str(), &dwHandle);

     if (0 == dwVersionInfoSize)
     {
         return false;
     }

     char* pVersionInfo = new char[dwVersionInfoSize];
     if (FALSE == ::GetFileVersionInfo((char*)filePath.c_str(), 0, dwVersionInfoSize, pVersionInfo))
     {
         delete[] pVersionInfo;
         return false;
     }

     VS_FIXEDFILEINFO* pVersion = NULL;
     unsigned int nLen;
     if(FALSE == ::VerQueryValue(pVersionInfo, "//", (void**)&pVersion, &nLen))
     {
         delete[] pVersionInfo;
         return false;
     }

     nFileVersionMS = pVersion->dwFileVersionMS;
     nFileVersionLS = pVersion->dwFileVersionLS;

     delete[] pVersionInfo;
     return true;
 }