C / C++ / MFC

// declaring
int arrayUninit[26][26];
int arrayInit[26][26] = {
  { 0, 1, 2, ..., 25 },
  { 0, 1, 2, ..., 25 },
  ...
};

// Clearing all
memeset(arrayUnint, 0, 26 * 26 * sizeof(int));

// accessing elements
for (int x = 0; x < 26; x++)
  for (int y = 0; y < 26; y++)
    arrayUninit[x][y] = ...;

// stop a new document being created if just run normally
if (cmdInfo.m_nShellCommand == CCommandLineInfo::FileNew)
    cmdInfo.m_nShellCommand = CCommandLineInfo::FileNothing ;