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Improve VerQueryValue examples #2104

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bc5c216
Improve VerQueryValueA example
merlinz01 Sep 25, 2025
a688102
Improve VerQueryValueW example
merlinz01 Sep 25, 2025
04d88c3
Add missing variable declaration
merlinz01 Sep 25, 2025
6645ef8
Add missing variable declaration
merlinz01 Sep 25, 2025
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72 changes: 42 additions & 30 deletions sdk-api-src/content/winver/nf-winver-verqueryvaluea.md
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Original file line number Diff line number Diff line change
Expand Up @@ -154,48 +154,60 @@ Be sure to call the <a href="/windows/desktop/api/winver/nf-winver-getfileversio


```cpp

// Structure used to store enumerated languages and code pages.
typedef struct {
WORD wLanguage;
WORD wCodePage;
} LANGANDCODEPAGE;

LANGANDCODEPAGE *lpTranslations;
UINT cbTranslations;
HRESULT hr;

struct LANGANDCODEPAGE {
WORD wLanguage;
WORD wCodePage;
} *lpTranslate;
BOOL exists;
TCHAR *lpBuffer;
DWORD dwBytes;
TCHAR SubBlock[50];

// Read the list of languages and code pages.

VerQueryValue(pBlock,
TEXT("\\VarFileInfo\\Translation"),
(LPVOID*)&lpTranslate,
&cbTranslate);

// Read the file description for each language and code page.

for( i=0; i < (cbTranslate/sizeof(struct LANGANDCODEPAGE)); i++ )
exists = VerQueryValue(
pBlock,
TEXT("\\VarFileInfo\\Translation"),
(LPVOID*)&lpTranslations,
&cbTranslations);
if (!exists)
{
// No translation information.
}
else
{
hr = StringCchPrintf(SubBlock, 50,
TEXT("\\StringFileInfo\\%04x%04x\\FileDescription"),
lpTranslate[i].wLanguage,
lpTranslate[i].wCodePage);
// Read the file description for each language and code page.
for( i=0; i < (cbTranslations/sizeof(struct LANGANDCODEPAGE)); i++ )
{
hr = StringCchPrintf(
SubBlock,
50,
TEXT("\\StringFileInfo\\%04x%04x\\FileDescription"),
lpTranslations[i].wLanguage,
lpTranslations[i].wCodePage);
if (FAILED(hr))
{
// TODO: write error handler.
// Handle error
}

// Retrieve file description for language and code page "i".
exists = VerQueryValue(
pBlock,
SubBlock,
&lpBuffer,
&dwBytes);
if (exists)
{
// Do something with the data.
}

// Retrieve file description for language and code page "i".
VerQueryValue(pBlock,
SubBlock,
&lpBuffer,
&dwBytes);
}
```






> [!NOTE]
> The winver.h header defines VerQueryValue as an alias that automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that is not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see [Conventions for Function Prototypes](/windows/win32/intl/conventions-for-function-prototypes).

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67 changes: 42 additions & 25 deletions sdk-api-src/content/winver/nf-winver-verqueryvaluew.md
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Original file line number Diff line number Diff line change
Expand Up @@ -169,40 +169,57 @@ Be sure to call the <a href="/windows/desktop/api/winver/nf-winver-getfileversio


```cpp

// Structure used to store enumerated languages and code pages.
typedef struct {
WORD wLanguage;
WORD wCodePage;
} LANGANDCODEPAGE;

LANGANDCODEPAGE *lpTranslations;
UINT cbTranslations;
HRESULT hr;

struct LANGANDCODEPAGE {
WORD wLanguage;
WORD wCodePage;
} *lpTranslate;
BOOL exists;
TCHAR *lpBuffer;
DWORD dwBytes;
TCHAR SubBlock[50];

// Read the list of languages and code pages.

VerQueryValue(pBlock,
TEXT("\\VarFileInfo\\Translation"),
(LPVOID*)&lpTranslate,
&cbTranslate);

// Read the file description for each language and code page.

for( i=0; i < (cbTranslate/sizeof(struct LANGANDCODEPAGE)); i++ )
exists = VerQueryValue(
pBlock,
TEXT("\\VarFileInfo\\Translation"),
(LPVOID*)&lpTranslations,
&cbTranslations);
if (!exists)
{
hr = StringCchPrintf(SubBlock, 50,
TEXT("\\StringFileInfo\\%04x%04x\\FileDescription"),
lpTranslate[i].wLanguage,
lpTranslate[i].wCodePage);
// No translation information.
}
else
{
// Read the file description for each language and code page.
for( i=0; i < (cbTranslations/sizeof(struct LANGANDCODEPAGE)); i++ )
{
hr = StringCchPrintf(
SubBlock,
50,
TEXT("\\StringFileInfo\\%04x%04x\\FileDescription"),
lpTranslations[i].wLanguage,
lpTranslations[i].wCodePage);
if (FAILED(hr))
{
// TODO: write error handler.
// Handle error
}

// Retrieve file description for language and code page "i".
exists = VerQueryValue(
pBlock,
SubBlock,
&lpBuffer,
&dwBytes);
if (exists)
{
// Do something with the data.
}

// Retrieve file description for language and code page "i".
VerQueryValue(pBlock,
SubBlock,
&lpBuffer,
&dwBytes);
}
```

Expand Down