关于枚举注册表键值问题

[sghc_lv]

#include <windows.h>
#include <stdio.h>
#include <tchar.h>

#define MAX_KEY_LENGTH 255
#define MAX_VALUE_NAME 16383

void QueryKey(HKEY hKey)
{

TCHAR achClass[MAX_PATH] = TEXT(""); // buffer for class name
DWORD cchClassName = MAX_PATH; // size of class string
DWORD cSubKeys=0; // number of subkeys
DWORD cbMaxSubKey; // longest subkey size
DWORD cchMaxClass; // longest class string
DWORD cValues; // number of values for key
DWORD cchMaxValue; // longest value name
DWORD cbMaxValueData; // longest value data
DWORD cbSecurityDescriptor; // size of security descriptor
FILETIME ftLastWriteTime; // last write time

DWORD i, retCode;

TCHAR achValue[MAX_VALUE_NAME];
TCHAR ValueInfo[MAX_VALUE_NAME];
DWORD ValueSize;
DWORD cchValue = MAX_VALUE_NAME;

// Get the class name and the value count.
retCode = RegQueryInfoKey(
hKey, // key handle
achClass, // buffer for class name
&cchClassName, // size of class string
NULL, // reserved
&cSubKeys, // number of subkeys
&cbMaxSubKey, // longest subkey size
&cchMaxClass, // longest class string
&cValues, // number of values for this key
&cchMaxValue, // longest value name
&cbMaxValueData, // longest value data
&cbSecurityDescriptor, // security descriptor
&ftLastWriteTime); // last write time



// Enumerate the key values.

if (cValues)
{
printf( "\nNumber of values: %d\n", cValues);

for (i=0, retCode=ERROR_SUCCESS; i<cValues; i++)
{
cchValue = MAX_VALUE_NAME;
achValue[0] = '\0';
retCode = RegEnumValue(hKey, i,
achValue,
&cchValue,
NULL,
NULL,
NULL,
NULL);

if (retCode == ERROR_SUCCESS )
{

_tprintf(TEXT("(%d) %s\n"), i+1, achValue);
}
if(RegQueryValueEx(hKey,achValue,NULL,NULL,(LPBYTE)ValueInfo,&ValueSize)==ERROR_SUCCESS)
_tprintf(TEXT("%s\n"), ValueInfo);
}
}
}

void _tmain(void)
{
HKEY hTestKey;

if( RegOpenKeyEx( HKEY_LOCAL_MACHINE,
TEXT("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run"),
0,
KEY_READ,
&hTestKey) == ERROR_SUCCESS
)
{
QueryKey(hTestKey);
}
}

为什么总是有些键值读不出来。

[cnzdgs]

RegQueryValueEx之前加上ValueSize=MAX_VALUE_NAME;

[sghc_lv]

thanks 问题解决！