Windows の製品名「Windows 10 Enterprise 2016 LTSB」や「Windows 7 Professional」などは、レジストリの
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion
の中の
ProductName
に文字列として設定されていますので、その値を取得するコードを書いてみました。
#pragma comment(linker,"\"/manifestdependency:type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"") #include <windows.h> TCHAR szClassName[] = TEXT("Window"); BOOL GetProductNameFromRegistry(LPWSTR lpszProductName, INT nStringLength) { BOOL bSuccess = FALSE; HKEY hKey; if (ERROR_SUCCESS == RegOpenKeyExW(HKEY_LOCAL_MACHINE, L"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion", 0, KEY_READ | KEY_WOW64_64KEY, &hKey)) { DWORD dwSize = 0; if (ERROR_SUCCESS == RegQueryValueExW(hKey, L"ProductName", 0, 0, 0, &dwSize) && dwSize != 0) { LPWSTR lpszValue = (LPWSTR)GlobalAlloc(GMEM_FIXED, dwSize); if (lpszValue) { if (ERROR_SUCCESS == RegQueryValueExW(hKey, L"ProductName", 0, 0, (LPBYTE)lpszValue, &dwSize) && dwSize != 0) { if (lstrcpynW(lpszProductName, lpszValue, nStringLength)) { bSuccess = TRUE; } } GlobalFree(lpszValue); } } RegCloseKey(hKey); } return bSuccess; } LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) { static HWND hEdit; switch (msg) { case WM_CREATE: hEdit = CreateWindow(TEXT("EDIT"), 0, WS_VISIBLE | WS_CHILD | ES_READONLY | ES_AUTOHSCROLL, 0, 0, 0, 0, hWnd, 0, ((LPCREATESTRUCT)lParam)->hInstance, 0); { WCHAR szProductName[256] = { 0 }; if (GetProductNameFromRegistry(szProductName, _countof(szProductName))) { SetWindowTextW(hEdit, szProductName); } else { SetWindowTextW(hEdit, L"取得に失敗しました"); } } break; case WM_SIZE: MoveWindow(hEdit, 10, 10, LOWORD(lParam) - 20, 32, TRUE); break; case WM_DESTROY: PostQuitMessage(0); break; default: return DefWindowProc(hWnd, msg, wParam, lParam); } return 0; } int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPreInst, LPSTR pCmdLine, int nCmdShow) { MSG msg; WNDCLASS wndclass = { CS_HREDRAW | CS_VREDRAW, WndProc, 0, 0, hInstance, 0, LoadCursor(0,IDC_ARROW), (HBRUSH)(COLOR_WINDOW + 1), 0, szClassName }; RegisterClass(&wndclass); HWND hWnd = CreateWindow( szClassName, TEXT("レジストリーから OS の製品名を取得する"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, 0, 0, hInstance, 0 ); ShowWindow(hWnd, SW_SHOWDEFAULT); UpdateWindow(hWnd); while (GetMessage(&msg, 0, 0, 0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return (int)msg.wParam; }