programs/regedit/edit.c

   1 /*
   2  * Registry editing UI functions.
   3  *
   4  * Copyright (C) 2003 Dimitrie O. Paun
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #define WIN32_LEAN_AND_MEAN     /* Exclude rarely-used stuff from Windows headers */
  22
  23 #include <windows.h>
  24 #include <tchar.h>
  25 #include <commctrl.h>
  26 #include <commdlg.h>
  27 #include <cderr.h>
  28 #include <stdlib.h>
  29 #include <stdio.h>
  30 #include <shellapi.h>
  31 #include <shlwapi.h>
  32
  33 #include "main.h"
  34 #include "regproc.h"
  35 #include "resource.h"
  36
  37 static const WCHAR* editValueName;
  38 static WCHAR* stringValueData;
  39 static BOOL isDecimal;
  40
  41 struct edit_params
  42 {
  43     HKEY    hKey;
  44     LPCWSTR lpszValueName;
  45     void   *pData;
  46     LONG    cbData;
  47 };
  48
  49 static INT vmessagebox(HWND hwnd, INT buttons, INT titleId, INT resId, va_list ap)
  50 {
  51     TCHAR title[256];
  52     TCHAR errfmt[1024];
  53     TCHAR errstr[1024];
  54
  55     if (!LoadString(hInst, titleId, title, COUNT_OF(title)))
  56         lstrcpy(title, "Error");
  57
  58     if (!LoadString(hInst, resId, errfmt, COUNT_OF(errfmt)))
  59         lstrcpy(errfmt, "Unknown error string!");
  60
  61     _vsntprintf(errstr, COUNT_OF(errstr), errfmt, ap);
  62
  63     return MessageBox(hwnd, errstr, title, buttons);
  64 }
  65
  66 static INT messagebox(HWND hwnd, INT buttons, INT titleId, INT resId, ...)
  67 {
  68     va_list ap;
  69     INT result;
  70
  71     va_start(ap, resId);
  72     result = vmessagebox(hwnd, buttons, titleId, resId, ap);
  73     va_end(ap);
  74
  75     return result;
  76 }
  77
  78 void error(HWND hwnd, INT resId, ...)
  79 {
  80     va_list ap;
  81
  82     va_start(ap, resId);
  83     vmessagebox(hwnd, MB_OK | MB_ICONERROR, IDS_ERROR, resId, ap);
  84     va_end(ap);
  85 }
  86
  87 static void error_code_messagebox(HWND hwnd, DWORD error_code)
  88 {
  89     LPTSTR lpMsgBuf;
  90     DWORD status;
  91     TCHAR title[256];
  92     static TCHAR fallback[] = TEXT("Error displaying error message.\n");
  93     if (!LoadString(hInst, IDS_ERROR, title, COUNT_OF(title)))
  94         lstrcpy(title, TEXT("Error"));
  95     status = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
  96                            NULL, error_code, 0, (LPTSTR)&lpMsgBuf, 0, NULL);
  97     if (!status)
  98         lpMsgBuf = fallback;
  99     MessageBox(hwnd, lpMsgBuf, title, MB_OK | MB_ICONERROR);
 100     if (lpMsgBuf != fallback)
 101         LocalFree(lpMsgBuf);
 102 }
 103
 104 static BOOL change_dword_base(HWND hwndDlg, BOOL toHex)
 105 {
 106     TCHAR buf[128];
 107     DWORD val;
 108
 109     if (!GetDlgItemText(hwndDlg, IDC_VALUE_DATA, buf, COUNT_OF(buf))) return FALSE;
 110     if (!_stscanf(buf, toHex ? "%u" : "%x", &val)) return FALSE;
 111     wsprintf(buf, toHex ? "%x" : "%u", val);
 112     return SetDlgItemText(hwndDlg, IDC_VALUE_DATA, buf);
 113 }
 114
 115 static INT_PTR CALLBACK modify_dlgproc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
 116 {
 117     WCHAR* valueData;
 118     HWND hwndValue;
 119     int len;
 120
 121     switch(uMsg) {
 122     case WM_INITDIALOG:
 123         SetDlgItemTextW(hwndDlg, IDC_VALUE_NAME, editValueName);
 124         SetDlgItemTextW(hwndDlg, IDC_VALUE_DATA, stringValueData);
 125         CheckRadioButton(hwndDlg, IDC_DWORD_HEX, IDC_DWORD_DEC, isDecimal ? IDC_DWORD_DEC : IDC_DWORD_HEX);
 126         return TRUE;
 127     case WM_COMMAND:
 128         switch (LOWORD(wParam)) {
 129         case IDC_DWORD_HEX:
 130             if (isDecimal && change_dword_base(hwndDlg, TRUE)) isDecimal = FALSE;
 131         break;
 132         case IDC_DWORD_DEC:
 133             if (!isDecimal && change_dword_base(hwndDlg, FALSE)) isDecimal = TRUE;
 134         break;
 135         case IDOK:
 136             if ((hwndValue = GetDlgItem(hwndDlg, IDC_VALUE_DATA))) {
 137                 len = GetWindowTextLengthW(hwndValue);
 138                 if ((valueData = HeapReAlloc(GetProcessHeap(), 0, stringValueData, (len + 1) * sizeof(WCHAR)))) {
 139                     stringValueData = valueData;
 140                     if (!GetWindowTextW(hwndValue, stringValueData, len + 1))
 141                         *stringValueData = 0;
 142                 }
 143             }
 144             /* Fall through */
 145         case IDCANCEL:
 146             EndDialog(hwndDlg, wParam);
 147             return TRUE;
 148         }
 149     }
 150     return FALSE;
 151 }
 152
 153 static INT_PTR CALLBACK bin_modify_dlgproc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
 154 {
 155     struct edit_params *params;
 156     LPBYTE pData;
 157     LONG cbData;
 158     LONG lRet;
 159
 160     switch(uMsg) {
 161     case WM_INITDIALOG:
 162         params = (struct edit_params *)lParam;
 163         SetWindowLongPtr(hwndDlg, DWLP_USER, (ULONG_PTR)params);
 164         if (params->lpszValueName)
 165             SetDlgItemTextW(hwndDlg, IDC_VALUE_NAME, params->lpszValueName);
 166         else
 167             SetDlgItemTextW(hwndDlg, IDC_VALUE_NAME, g_pszDefaultValueNameW);
 168         SendDlgItemMessage(hwndDlg, IDC_VALUE_DATA, HEM_SETDATA, (WPARAM)params->cbData, (LPARAM)params->pData);
 169         return TRUE;
 170     case WM_COMMAND:
 171         switch (LOWORD(wParam)) {
 172         case IDOK:
 173             params = (struct edit_params *)GetWindowLongPtr(hwndDlg, DWLP_USER);
 174             cbData = SendDlgItemMessage(hwndDlg, IDC_VALUE_DATA, HEM_GETDATA, 0, 0);
 175             pData = HeapAlloc(GetProcessHeap(), 0, cbData);
 176
 177             if (pData)
 178             {
 179                 SendDlgItemMessageW(hwndDlg, IDC_VALUE_DATA, HEM_GETDATA, (WPARAM)cbData, (LPARAM)pData);
 180                 lRet = RegSetValueExW(params->hKey, params->lpszValueName, 0, REG_BINARY, pData, cbData);
 181             }
 182             else
 183                 lRet = ERROR_OUTOFMEMORY;
 184
 185             if (lRet == ERROR_SUCCESS)
 186                 EndDialog(hwndDlg, 1);
 187             else
 188             {
 189                 error_code_messagebox(hwndDlg, lRet);
 190                 EndDialog(hwndDlg, 0);
 191             }
 192             return TRUE;
 193         case IDCANCEL:
 194             EndDialog(hwndDlg, 0);
 195             return TRUE;
 196         }
 197     }
 198     return FALSE;
 199 }
 200
 201 static BOOL check_value(HWND hwnd, HKEY hKey, LPCWSTR valueName)
 202 {
 203     WCHAR empty = 0;
 204     LONG lRet = RegQueryValueExW(hKey, valueName ? valueName : &empty, 0, NULL, 0, NULL);
 205     if(lRet != ERROR_SUCCESS) return FALSE;
 206     return TRUE;
 207 }
 208
 209 static LPWSTR read_value(HWND hwnd, HKEY hKey, LPCWSTR valueName, DWORD *lpType, LONG *len)
 210 {
 211     DWORD valueDataLen;
 212     LPWSTR buffer = NULL;
 213     LONG lRet;
 214         WCHAR empty = 0;
 215
 216     lRet = RegQueryValueExW(hKey, valueName ? valueName : &empty, 0, lpType, 0, &valueDataLen);
 217     if (lRet != ERROR_SUCCESS) {
 218         if (lRet == ERROR_FILE_NOT_FOUND && !valueName) { /* no default value here, make it up */
 219             if (len) *len = 1;
 220             if (lpType) *lpType = REG_SZ;
 221             buffer = HeapAlloc(GetProcessHeap(), 0, sizeof(WCHAR));
 222             *buffer = '\0';
 223             return buffer;
 224         }
 225         error(hwnd, IDS_BAD_VALUE, valueName);
 226         goto done;
 227     }
 228     if ( *lpType == REG_DWORD ) valueDataLen = sizeof(DWORD);
 229     if (!(buffer = HeapAlloc(GetProcessHeap(), 0, valueDataLen+sizeof(WCHAR)))) {
 230         error(hwnd, IDS_TOO_BIG_VALUE, valueDataLen);
 231         goto done;
 232     }
 233     lRet = RegQueryValueExW(hKey, valueName, 0, 0, (LPBYTE)buffer, &valueDataLen);
 234     if (lRet != ERROR_SUCCESS) {
 235         error(hwnd, IDS_BAD_VALUE, valueName);
 236         goto done;
 237     }
 238     if((valueDataLen % sizeof(WCHAR)) == 0)
 239         buffer[valueDataLen / sizeof(WCHAR)] = 0;
 240     if(len) *len = valueDataLen;
 241     return buffer;
 242
 243 done:
 244     HeapFree(GetProcessHeap(), 0, buffer);
 245     return NULL;
 246 }
 247
 248 BOOL CreateKey(HWND hwnd, HKEY hKeyRoot, LPCWSTR keyPath, LPWSTR keyName)
 249 {
 250     BOOL result = FALSE;
 251     LONG lRet = ERROR_SUCCESS;
 252     HKEY retKey = NULL;
 253     WCHAR newKey[MAX_NEW_KEY_LEN - 4];
 254     int keyNum;
 255     HKEY hKey;
 256
 257     lRet = RegOpenKeyExW(hKeyRoot, keyPath, 0, KEY_CREATE_SUB_KEY, &hKey);
 258     if (lRet != ERROR_SUCCESS) {
 259         error_code_messagebox(hwnd, lRet);
 260         goto done;
 261     }
 262
 263     if (!LoadStringW(GetModuleHandle(0), IDS_NEWKEY, newKey, COUNT_OF(newKey))) goto done;
 264
 265     /* try to find out a name for the newly create key (max 100 times) */
 266     for (keyNum = 1; keyNum < 100; keyNum++) {
 267         wsprintfW(keyName, newKey, keyNum);
 268         lRet = RegOpenKeyW(hKey, keyName, &retKey);
 269         if (lRet != ERROR_SUCCESS) break;
 270         RegCloseKey(retKey);
 271     }
 272     if (lRet == ERROR_SUCCESS) goto done;
 273
 274     lRet = RegCreateKeyW(hKey, keyName, &retKey);
 275     if (lRet != ERROR_SUCCESS) {
 276         error_code_messagebox(hwnd, lRet);
 277         goto done;
 278     }
 279
 280     result = TRUE;
 281
 282 done:
 283     RegCloseKey(retKey);
 284     return result;
 285 }
 286
 287 BOOL ModifyValue(HWND hwnd, HKEY hKeyRoot, LPCWSTR keyPath, LPCWSTR valueName)
 288 {
 289     BOOL result = FALSE;
 290     DWORD type;
 291     LONG lRet;
 292     HKEY hKey;
 293     LONG len;
 294
 295     lRet = RegOpenKeyExW(hKeyRoot, keyPath, 0, KEY_READ | KEY_SET_VALUE, &hKey);
 296     if (lRet != ERROR_SUCCESS) {
 297         error_code_messagebox(hwnd, lRet);
 298         return FALSE;
 299     }
 300
 301     editValueName = valueName ? valueName : g_pszDefaultValueNameW;
 302     if(!(stringValueData = read_value(hwnd, hKey, valueName, &type, &len))) goto done;
 303
 304     if ( (type == REG_SZ) || (type == REG_EXPAND_SZ) ) {
 305         if (DialogBoxW(0, MAKEINTRESOURCEW(IDD_EDIT_STRING), hwnd, modify_dlgproc) == IDOK) {
 306             lRet = RegSetValueExW(hKey, valueName, 0, type, (LPBYTE)stringValueData, (lstrlenW(stringValueData) + 1) * sizeof(WCHAR));
 307             if (lRet == ERROR_SUCCESS) result = TRUE;
 308             else error_code_messagebox(hwnd, lRet);
 309         }
 310     } else if ( type == REG_DWORD ) {
 311         const WCHAR u[] = {'%','u',0};
 312         const WCHAR x[] = {'%','x',0};
 313         wsprintfW(stringValueData, isDecimal ? u : x, *((DWORD*)stringValueData));
 314         if (DialogBoxW(0, MAKEINTRESOURCEW(IDD_EDIT_DWORD), hwnd, modify_dlgproc) == IDOK) {
 315             DWORD val;
 316             CHAR* valueA = GetMultiByteString(stringValueData);
 317             if (_stscanf(valueA, isDecimal ? "%u" : "%x", &val)) {
 318                 lRet = RegSetValueExW(hKey, valueName, 0, type, (BYTE*)&val, sizeof(val));
 319                 if (lRet == ERROR_SUCCESS) result = TRUE;
 320                 else error_code_messagebox(hwnd, lRet);
 321             }
 322             HeapFree(GetProcessHeap(), 0, valueA);
 323         }
 324     } else if ( type == REG_BINARY ) {
 325         struct edit_params params;
 326         params.hKey = hKey;
 327         params.lpszValueName = valueName;
 328         params.pData = stringValueData;
 329         params.cbData = len;
 330         result = DialogBoxParam(NULL, MAKEINTRESOURCE(IDD_EDIT_BINARY), hwnd,
 331             bin_modify_dlgproc, (LPARAM)&params);
 332     } else if ( type == REG_MULTI_SZ ) {
 333         WCHAR char1 = '\r', char2 = '\n';
 334         WCHAR *tmpValueData = NULL;
 335         INT i, j, count;
 336
 337         for ( i = 0, count = 0; i < len - 1; i++)
 338             if ( !stringValueData[i] && stringValueData[i + 1] )
 339                 count++;
 340         tmpValueData = HeapAlloc( GetProcessHeap(), 0, ( len + count ) * sizeof(WCHAR));
 341         if ( !tmpValueData ) goto done;
 342
 343         for ( i = 0, j = 0; i < len - 1; i++)
 344         {
 345             if ( !stringValueData[i] && stringValueData[i + 1])
 346             {
 347                 tmpValueData[j++] = char1;
 348                 tmpValueData[j++] = char2;
 349             }
 350             else
 351                 tmpValueData[j++] = stringValueData[i];
 352         }
 353         tmpValueData[j] = stringValueData[i];
 354         HeapFree( GetProcessHeap(), 0, stringValueData);
 355         stringValueData = tmpValueData;
 356         tmpValueData = NULL;
 357
 358         if (DialogBoxW(0, MAKEINTRESOURCEW(IDD_EDIT_MULTI_STRING), hwnd, modify_dlgproc) == IDOK)
 359         {
 360             len = lstrlenW( stringValueData );
 361             tmpValueData = HeapAlloc( GetProcessHeap(), 0, (len + 2) * sizeof(WCHAR));
 362             if ( !tmpValueData ) goto done;
 363
 364             for ( i = 0, j = 0; i < len - 1; i++)
 365             {
 366                 if ( stringValueData[i] == char1 && stringValueData[i + 1] == char2)
 367                 {
 368                     if ( tmpValueData[j - 1] != 0)
 369                         tmpValueData[j++] = 0;
 370                     i++;
 371                 }
 372                 else
 373                     tmpValueData[j++] = stringValueData[i];
 374             }
 375             tmpValueData[j++] = stringValueData[i];
 376             tmpValueData[j++] = 0;
 377             tmpValueData[j++] = 0;
 378             HeapFree( GetProcessHeap(), 0, stringValueData);
 379             stringValueData = tmpValueData;
 380
 381             lRet = RegSetValueExW(hKey, valueName, 0, type, (LPBYTE)stringValueData, j * sizeof(TCHAR));
 382             if (lRet == ERROR_SUCCESS) result = TRUE;
 383             else error_code_messagebox(hwnd, lRet);
 384         }
 385     } else {
 386         error(hwnd, IDS_UNSUPPORTED_TYPE, type);
 387     }
 388
 389 done:
 390     HeapFree(GetProcessHeap(), 0, stringValueData);
 391     stringValueData = NULL;
 392     RegCloseKey(hKey);
 393     return result;
 394 }
 395
 396 BOOL DeleteKey(HWND hwnd, HKEY hKeyRoot, LPCWSTR keyPath)
 397 {
 398     BOOL result = FALSE;
 399     LONG lRet;
 400     HKEY hKey;
 401     CHAR* keyPathA = GetMultiByteString(keyPath);
 402
 403     lRet = RegOpenKeyExW(hKeyRoot, keyPath, 0, KEY_READ|KEY_SET_VALUE, &hKey);
 404     if (lRet != ERROR_SUCCESS) {
 405         error_code_messagebox(hwnd, lRet);
 406         return FALSE;
 407     }
 408
 409     if (messagebox(hwnd, MB_YESNO | MB_ICONEXCLAMATION, IDS_DELETE_BOX_TITLE, IDS_DELETE_BOX_TEXT, keyPathA) != IDYES)
 410         goto done;
 411
 412     lRet = SHDeleteKeyW(hKeyRoot, keyPath);
 413     if (lRet != ERROR_SUCCESS) {
 414         error(hwnd, IDS_BAD_KEY, keyPath);
 415         goto done;
 416     }
 417     result = TRUE;
 418
 419 done:
 420     RegCloseKey(hKey);
 421     HeapFree(GetProcessHeap(), 0, keyPathA);
 422     return result;
 423 }
 424
 425 BOOL DeleteValue(HWND hwnd, HKEY hKeyRoot, LPCWSTR keyPath, LPCWSTR valueName, BOOL showMessageBox)
 426 {
 427     BOOL result = FALSE;
 428     LONG lRet;
 429     HKEY hKey;
 430     LPCWSTR visibleValueName = valueName ? valueName : g_pszDefaultValueNameW;
 431     WCHAR empty = 0;
 432
 433     lRet = RegOpenKeyExW(hKeyRoot, keyPath, 0, KEY_READ | KEY_SET_VALUE, &hKey);
 434     if (lRet != ERROR_SUCCESS) return FALSE;
 435
 436     if (showMessageBox)
 437     {
 438         LPSTR visibleValueNameA = GetMultiByteString(visibleValueName);
 439         if (messagebox(hwnd, MB_YESNO | MB_ICONEXCLAMATION, IDS_DELETE_BOX_TITLE, IDS_DELETE_BOX_TEXT, visibleValueNameA) != IDYES)
 440         {
 441                 HeapFree(GetProcessHeap(), 0, visibleValueNameA);
 442                 goto done;
 443         }
 444         HeapFree(GetProcessHeap(), 0, visibleValueNameA);
 445     }
 446
 447     lRet = RegDeleteValueW(hKey, valueName ? valueName : &empty);
 448     if (lRet != ERROR_SUCCESS && valueName) {
 449         error(hwnd, IDS_BAD_VALUE, valueName);
 450     }
 451     if (lRet != ERROR_SUCCESS) goto done;
 452     result = TRUE;
 453
 454 done:
 455     RegCloseKey(hKey);
 456     return result;
 457 }
 458
 459 BOOL CreateValue(HWND hwnd, HKEY hKeyRoot, LPCWSTR keyPath, DWORD valueType, LPWSTR valueName)
 460 {
 461     LONG lRet = ERROR_SUCCESS;
 462     WCHAR newValue[256];
 463     DWORD valueDword = 0;
 464     BOOL result = FALSE;
 465     int valueNum;
 466     HKEY hKey;
 467
 468     lRet = RegOpenKeyExW(hKeyRoot, keyPath, 0, KEY_READ | KEY_SET_VALUE, &hKey);
 469     if (lRet != ERROR_SUCCESS) {
 470         error_code_messagebox(hwnd, lRet);
 471         return FALSE;
 472     }
 473
 474     if (!LoadStringW(GetModuleHandle(0), IDS_NEWVALUE, newValue, COUNT_OF(newValue))) goto done;
 475
 476     /* try to find out a name for the newly create key (max 100 times) */
 477     for (valueNum = 1; valueNum < 100; valueNum++) {
 478         wsprintfW(valueName, newValue, valueNum);
 479         lRet = RegQueryValueExW(hKey, valueName, 0, 0, 0, 0);
 480         if (lRet == ERROR_FILE_NOT_FOUND) break;
 481     }
 482     if (lRet != ERROR_FILE_NOT_FOUND) {
 483         error_code_messagebox(hwnd, lRet);
 484         goto done;
 485     }
 486
 487     lRet = RegSetValueExW(hKey, valueName, 0, valueType, (BYTE*)&valueDword, sizeof(DWORD));
 488     if (lRet != ERROR_SUCCESS) {
 489         error_code_messagebox(hwnd, lRet);
 490         goto done;
 491     }
 492     result = TRUE;
 493
 494 done:
 495     RegCloseKey(hKey);
 496     return result;
 497 }
 498
 499 BOOL RenameValue(HWND hwnd, HKEY hKeyRoot, LPCWSTR keyPath, LPCWSTR oldName, LPCWSTR newName)
 500 {
 501     LPWSTR value = NULL;
 502     DWORD type;
 503     LONG len, lRet;
 504     BOOL result = FALSE;
 505     HKEY hKey;
 506
 507     if (!oldName) return FALSE;
 508     if (!newName) return FALSE;
 509
 510     lRet = RegOpenKeyExW(hKeyRoot, keyPath, 0, KEY_READ | KEY_SET_VALUE, &hKey);
 511     if (lRet != ERROR_SUCCESS) {
 512         error_code_messagebox(hwnd, lRet);
 513         return FALSE;
 514     }
 515     /* check if value already exists */
 516     if (check_value(hwnd, hKey, newName)) goto done;
 517     value = read_value(hwnd, hKey, oldName, &type, &len);
 518     if(!value) goto done;
 519     lRet = RegSetValueExW(hKey, newName, 0, type, (BYTE*)value, len);
 520     if (lRet != ERROR_SUCCESS) {
 521         error_code_messagebox(hwnd, lRet);
 522         goto done;
 523     }
 524     lRet = RegDeleteValueW(hKey, oldName);
 525     if (lRet != ERROR_SUCCESS) {
 526         RegDeleteValueW(hKey, newName);
 527         error_code_messagebox(hwnd, lRet);
 528         goto done;
 529     }
 530     result = TRUE;
 531
 532 done:
 533     HeapFree(GetProcessHeap(), 0, value);
 534     RegCloseKey(hKey);
 535     return result;
 536 }
 537
 538
 539 BOOL RenameKey(HWND hwnd, HKEY hRootKey, LPCTSTR keyPath, LPCTSTR newName)
 540 {
 541     LPTSTR parentPath = 0;
 542     LPCTSTR srcSubKey = 0;
 543     HKEY parentKey = 0;
 544     HKEY destKey = 0;
 545     BOOL result = FALSE;
 546     LONG lRet;
 547     DWORD disposition;
 548
 549     if (!keyPath || !newName) return FALSE;
 550
 551     if (!strrchr(keyPath, '\\')) {
 552         parentKey = hRootKey;
 553         srcSubKey = keyPath;
 554     } else {
 555         LPTSTR srcSubKey_copy;
 556
 557         parentPath = strdup(keyPath);
 558         srcSubKey_copy = strrchr(parentPath, '\\');
 559         *srcSubKey_copy = 0;
 560         srcSubKey = srcSubKey_copy + 1;
 561         lRet = RegOpenKeyEx(hRootKey, parentPath, 0, KEY_READ | KEY_CREATE_SUB_KEY, &parentKey);
 562         if (lRet != ERROR_SUCCESS) {
 563             error_code_messagebox(hwnd, lRet);
 564             goto done;
 565         }
 566     }
 567
 568     /* The following fails if the old name is the same as the new name. */
 569     if (!strcmp(srcSubKey, newName)) goto done;
 570
 571     lRet = RegCreateKeyEx(parentKey, newName, 0, NULL, REG_OPTION_NON_VOLATILE,
 572         KEY_WRITE, NULL /* FIXME */, &destKey, &disposition);
 573     if (disposition == REG_OPENED_EXISTING_KEY)
 574         lRet = ERROR_FILE_EXISTS; /* FIXME: we might want a better error message than this */
 575     if (lRet != ERROR_SUCCESS) {
 576         error_code_messagebox(hwnd, lRet);
 577         goto done;
 578     }
 579
 580     /* FIXME: SHCopyKey does not copy the security attributes */
 581     lRet = SHCopyKey(parentKey, srcSubKey, destKey, 0);
 582     if (lRet != ERROR_SUCCESS) {
 583         RegCloseKey(destKey);
 584         RegDeleteKey(parentKey, newName);
 585         error_code_messagebox(hwnd, lRet);
 586         goto done;
 587     }
 588
 589     lRet = SHDeleteKey(hRootKey, keyPath);
 590     if (lRet != ERROR_SUCCESS) {
 591         error_code_messagebox(hwnd, lRet);
 592         goto done;
 593     }
 594
 595     result = TRUE;
 596
 597 done:
 598     RegCloseKey(destKey);
 599     if (parentKey) {
 600         RegCloseKey(parentKey);
 601         free(parentPath);
 602     }
 603     return result;
 604 }