winapi - 如何从资源获取版本信息？

我在声明的资源中有版本信息:

100 VERSIONINFO
FILEVERSION 1,0,0,2
PRODUCTVERSION 1,0,0,2
FILEOS VOS_NT
FILETYPE VFT_APP
{
    BLOCK "StringFileInfo"
    {
        BLOCK "000004b0"
        {
            VALUE "FileDescription", "My application"
            VALUE "FileVersion", "1.0.0.2"
            VALUE "InternalName", "app.exe"
            VALUE "LegalCopyright", "Copyright ©  2012 by David."
            VALUE "OriginalFilename", "app.exe"
            VALUE "ProductName", "app"
            VALUE "ProductVersion", "1.0.0.2"
            VALUE "Assembly Version", "1.0.0.2"
        }
    }

    BLOCK "VarFileInfo"
    {
        VALUE "Translation", 0x0000 0x04B0
    }
}

我通过这种方式获取版本信息:

HRSRC hResInfo;
HGLOBAL hResData;
LPCVOID pRes;
UINT uLen;
VS_FIXEDFILEINFO *lpFfi;

hResInfo = FindResource(hInst, MAKEINTRESOURCE(100), RT_VERSION);
MessageBox(0, "FindResource", 0,0);

hResData = LoadResource(hInst, hResInfo);
MessageBox(0, "LoadResource", 0,0);

pRes = LockResource(hResData);
MessageBox(0, "LockResource", 0,0);

VerQueryValue(pRes, "\\" ,(LPVOID*)&lpFfi, &uLen);
MessageBox(0, "VerQueryValue", 0,0);

FreeResource(hResData);

DWORD dwFileVersionMS = lpFfi->dwFileVersionMS;
DWORD dwFileVersionLS = lpFfi->dwFileVersionLS;

DWORD dwLeftMost     = HIWORD(dwFileVersionMS);
DWORD dwSecondLeft   = LOWORD(dwFileVersionMS);
DWORD dwSecondRight  = HIWORD(dwFileVersionLS);
DWORD dwRightMost    = LOWORD(dwFileVersionLS);

在函数VerQueryValue中是一个错误，因为程序中断(不显示带有文本“VerQueryValue”的MessageBox)，并且Visual C++向我显示了以下消息:



如何修复此代码？

问候，大卫

最佳答案

VerQueryValue()无法直接从原始资源访问版本信息。您必须在内存中复制资源，然后将该内存传递给VerQueryValue()。原因是因为VerQueryValue()设计为可与GetFileVersionInfo()一起使用，这需要用户分配的可写内存块并在该内存中执行某些修复。访问VS_FIXEDFILEINFO结构不需要修复程序，但是内存块仍必须可写。您不能将原始资源直接传递给VerQueryValue()，因为它是只读存储器。

尝试以下方法:

HRSRC hResInfo;
DWORD dwSize;
HGLOBAL hResData;
LPVOID pRes, pResCopy;
UINT uLen;
VS_FIXEDFILEINFO *lpFfi;

hResInfo = FindResource(hInst, MAKEINTRESOURCE(100), RT_VERSION);
dwSize = SizeofResource(hInst, hResInfo);
hResData = LoadResource(hInst, hResInfo);
pRes = LockResource(hResData);
pResCopy = LocalAlloc(LMEM_FIXED, dwSize);
CopyMemory(pResCopy, pRes, dwSize);
FreeResource(hResData);

VerQueryValue(pResCopy, TEXT("\\"), (LPVOID*)&lpFfi, &uLen);

DWORD dwFileVersionMS = lpFfi->dwFileVersionMS;
DWORD dwFileVersionLS = lpFfi->dwFileVersionLS;

DWORD dwLeftMost     = HIWORD(dwFileVersionMS);
DWORD dwSecondLeft   = LOWORD(dwFileVersionMS);
DWORD dwSecondRight  = HIWORD(dwFileVersionLS);
DWORD dwRightMost    = LOWORD(dwFileVersionLS);

LocalFree(pResCopy);

更新:仅在您访问VS_FIXEDFILEINFO结构时才有效。如果需要访问任何其他值，则必须使用GetFileVersionInfo()。 Per Raymond Chen的博客:

The first parameter to VerQueryValue really must be a buffer you obtained from GetFileVersionInfo