from msdn.microsoft.com - Enumerating Registry Subkeys:
http://msdn.microsoft.com/En-US/library/ms724256.aspx
// QueryKey - Enumerates the subkeys of key and its associated values.
// hKey - Key whose subkeys and values are to be enumerated.
#include <windows.h>
#include <stdio.h>
#include <tchar.h>
#define MAX_KEY_LENGTH 255
#define MAX_VALUE_NAME 16383
void QueryKey(HKEY hKey)
{
TCHAR achKey[MAX_KEY_LENGTH]; // buffer for subkey name
DWORD cbName; // size of name string
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];
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 subkeys, until RegEnumKeyEx fails.
if (cSubKeys)
{
printf( "\nNumber of subkeys: %d\n", cSubKeys);
for (i=0; i<cSubKeys; i++)
{
cbName = MAX_KEY_LENGTH;
retCode = RegEnumKeyEx(hKey, i,
achKey,
&cbName,
NULL,
NULL,
NULL,
&ftLastWriteTime);
if (retCode == ERROR_SUCCESS)
{
_tprintf(TEXT("(%d) %s\n"), i+1, achKey);
}
}
}
// 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);
}
}
}
}
void __cdecl _tmain(void)
{
HKEY hTestKey;
if( RegOpenKeyEx( HKEY_CURRENT_USER,
TEXT("SOFTWARE\\Microsoft"),
0,
KEY_READ,
&hTestKey) == ERROR_SUCCESS
)
{
QueryKey(hTestKey);
}
RegCloseKey(hTestKey);
}
how can i modify that code at:
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);
}
to output to the console all the values that RegEnumValue function can return, function at msdn: http://msdn.microsoft.com/en-us/library/windows/desktop/ms724865%28v=vs.85%29.aspx i want to output these vars too:
__out LPTSTR lpValueName,
__inout LPDWORD lpcchValueName,
__out_opt LPDWORD lpType,
__out_opt LPBYTE lpData,
__inout_opt LPDWORD lpcbData
i have tried different things but everytime i change any of NULL var from that function:
retCode = RegEnumValue(hKey, i, achValue, &cchValue, NULL, NULL, NULL, NULL);
i even donĀ“t get achValue
thanks a lot
PD using windows 7 64 bits visual studio 2010 ultimate