marcomaroni.it / taskbar-calculator
A simple, small calculator placed discreetly near the Windows Taskbar or anywhere on the screen
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feat: HKCU\Run fallback for start-at-login when unpackaged (classic install)

StartupManager now falls back to the Run registry key when the MSIX StartupTask
API is unavailable, so the tray toggle works in the classic installer build and
stays consistent with the installer-set Run value.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

authored by

Marco Maroni
Claude Opus 4.8 (1M context) and committed by
Tangled (Jul 15, 2026, 1:16 PM +0300) 6748edc6 0eb2580b

+36 -2
+36 -2
StartupManager.cpp
··· 11 11 12 12 namespace { 13 13 const wchar_t* kTaskId = L"TaskbarCalculatorStartup"; 14 + const wchar_t* kRunKey = L"Software\\Microsoft\\Windows\\CurrentVersion\\Run"; 15 + const wchar_t* kRunVal = L"TaskbarCalculator"; 16 + 17 + // --- HKCU\...\Run fallback (used when the app has no package identity) --- 18 + bool RunKeyExists() { 19 + HKEY h; 20 + if (RegOpenKeyExW(HKEY_CURRENT_USER, kRunKey, 0, KEY_QUERY_VALUE, &h) != ERROR_SUCCESS) 21 + return false; 22 + LONG r = RegQueryValueExW(h, kRunVal, nullptr, nullptr, nullptr, nullptr); 23 + RegCloseKey(h); 24 + return r == ERROR_SUCCESS; 25 + } 26 + 27 + bool RunKeySet(bool on) { 28 + HKEY h; 29 + if (RegCreateKeyExW(HKEY_CURRENT_USER, kRunKey, 0, nullptr, 0, 30 + KEY_SET_VALUE, nullptr, &h, nullptr) != ERROR_SUCCESS) 31 + return false; 32 + LONG r; 33 + if (on) { 34 + wchar_t path[MAX_PATH]; 35 + GetModuleFileNameW(nullptr, path, MAX_PATH); 36 + wchar_t quoted[MAX_PATH + 2]; 37 + wsprintfW(quoted, L"\"%s\"", path); 38 + r = RegSetValueExW(h, kRunVal, 0, REG_SZ, (const BYTE*)quoted, 39 + (DWORD)((lstrlenW(quoted) + 1) * sizeof(wchar_t))); 40 + } else { 41 + r = RegDeleteValueW(h, kRunVal); 42 + if (r == ERROR_FILE_NOT_FOUND) r = ERROR_SUCCESS; 43 + } 44 + RegCloseKey(h); 45 + return r == ERROR_SUCCESS; 46 + } 14 47 } 15 48 16 49 namespace Startup { ··· 26 59 return State::Disabled; 27 60 } 28 61 } catch (...) { 29 - return State::Unavailable; // unpackaged / API missing 62 + // Unpackaged (classic install): use the HKCU\Run fallback. 63 + return RunKeyExists() ? State::Enabled : State::Disabled; 30 64 } 31 65 } 32 66 ··· 42 76 return true; 43 77 } 44 78 } catch (...) { 45 - return false; 79 + return RunKeySet(on); 46 80 } 47 81 } 48 82