115 lines
2.5 KiB
C
115 lines
2.5 KiB
C
#pragma once
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#include <windows.h>
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#include <stdio.h>
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#include <strsafe.h>
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// Stolen from the "Deleting a Key with Subkeys" example to replace
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// RegDeleteTree which isn't available on WinXP.
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// https://msdn.microsoft.com/en-us/library/ms724235(VS.85).aspx
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//*************************************************************
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//
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// RegDelnodeRecurse()
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//
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// Purpose: Deletes a registry key and all its subkeys / values.
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//
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// Parameters: hKeyRoot - Root key
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// lpSubKey - SubKey to delete
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//
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// Return: TRUE if successful.
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// FALSE if an error occurs.
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//
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//*************************************************************
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HRESULT RegDelnodeRecurse(HKEY hKeyRoot, LPTSTR lpSubKey)
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{
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LPTSTR lpEnd;
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LONG lResult;
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DWORD dwSize;
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TCHAR szName[MAX_PATH];
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HKEY hKey;
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FILETIME ftWrite;
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// First, see if we can delete the key without having
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// to recurse.
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lResult = RegDeleteKey(hKeyRoot, lpSubKey);
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if (lResult == ERROR_SUCCESS)
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return lResult;
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lResult = RegOpenKeyEx(hKeyRoot, lpSubKey, 0, KEY_READ, &hKey);
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if (lResult != ERROR_SUCCESS)
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return lResult;
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// Check for an ending slash and add one if it is missing.
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lpEnd = lpSubKey + lstrlen(lpSubKey);
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if (*(lpEnd - 1) != TEXT('\\'))
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{
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*lpEnd = TEXT('\\');
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lpEnd++;
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*lpEnd = TEXT('\0');
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}
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// Enumerate the keys
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dwSize = MAX_PATH;
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lResult = RegEnumKeyEx(hKey, 0, szName, &dwSize, nullptr,
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nullptr, nullptr, &ftWrite);
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if (lResult == ERROR_SUCCESS)
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{
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do {
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StringCchCopy(lpEnd, MAX_PATH * 2, szName);
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if (RegDelnodeRecurse(hKeyRoot, lpSubKey) != ERROR_SUCCESS) {
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break;
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}
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dwSize = MAX_PATH;
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lResult = RegEnumKeyEx(hKey, 0, szName, &dwSize, nullptr,
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nullptr, nullptr, &ftWrite);
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} while (lResult == ERROR_SUCCESS);
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}
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lpEnd--;
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*lpEnd = TEXT('\0');
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RegCloseKey(hKey);
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// Try again to delete the key.
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lResult = RegDeleteKey(hKeyRoot, lpSubKey);
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return lResult;
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}
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//*************************************************************
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//
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// RegDelnode()
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//
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// Purpose: Deletes a registry key and all its subkeys / values.
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//
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// Parameters: hKeyRoot - Root key
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// lpSubKey - SubKey to delete
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//
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// Return: TRUE if successful.
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// FALSE if an error occurs.
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//
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//*************************************************************
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HRESULT RegDelnode(HKEY hKeyRoot, LPTSTR lpSubKey)
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{
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TCHAR szDelKey[MAX_PATH * 2];
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StringCchCopy(szDelKey, MAX_PATH * 2, lpSubKey);
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return RegDelnodeRecurse(hKeyRoot, szDelKey);
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}
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