Retrieve File Description an Application VerQueryValue

Question

I really confuse with this function. currently i success to retrieve File Version and Product Version. now i want to retrieve more information within application. like FileDescr

Answer 1

VerQueryValue(test, "\\StringFileInfo\\%04x%09x\\FileDescription",
   (LPVOID*)&sCompanyName, &pLenFileInfo);

The second parameter should be of this format "\\StringFileInfo\\NxM\\FileDescription" where N and M are wLanguage and wCodePage. Following the example in comment section, you can use "%04x%04x" as print format specifier to create a string. Example:

BOOL foo()
{
    const char* filename = "c:\\windows\\hh.exe";
    int dwLen = GetFileVersionInfoSize(filename, NULL);
    if(!dwLen)
        return 0;

    auto *sKey = new BYTE[dwLen];
    std::unique_ptr<BYTE[]> skey_automatic_cleanup(sKey);
    if(!GetFileVersionInfo(filename, NULL, dwLen, sKey))
        return 0;

    struct LANGANDCODEPAGE {
        WORD wLanguage;
        WORD wCodePage;
    } *lpTranslate;

    UINT cbTranslate = 0;
    if(!VerQueryValue(sKey, "\\VarFileInfo\\Translation",
        (LPVOID*)&lpTranslate, &cbTranslate))
        return 0;

    for(unsigned int i = 0; i < (cbTranslate / sizeof(LANGANDCODEPAGE)); i++)
    {
        char subblock[256];
        //use sprintf if sprintf_s is not available
        sprintf_s(subblock, "\\StringFileInfo\\%04x%04x\\FileDescription",
            lpTranslate[i].wLanguage, lpTranslate[i].wCodePage);
        char *description = NULL;
        UINT dwBytes;
        if(VerQueryValue(sKey, subblock, (LPVOID*)&description, &dwBytes))
            MessageBox(0, description, 0, 0);
    }
    return TRUE;
}