Function GetAHKInstallDir

source/script2.cpp:4731–4753

DWORD GetAHKInstallDir(LPTSTR aBuf)
// Caller must ensure that aBuf is large enough (either by having called this function a previous time
// to get the length, or by making it MAX_PATH in capacity).
// Returns the length of the string (0 if empty).
{
	TCHAR buf[MAX_PATH];
	DWORD length;
#ifdef _WIN64
	// First try 64-bit registry, then 32-bit registry.
	for (DWORD flag = 0; ; flag = KEY_WOW64_32KEY)
#else
	// First try 32-bit registry, then 64-bit registry.
	for (DWORD flag = 0; ; flag = KEY_WOW64_64KEY)
#endif
	{
		length = ReadRegString(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\AutoHotkey"), _T("InstallDir"), buf, MAX_PATH, flag);
		if (length || flag)
			break;
	}
	if (aBuf)
		_tcscpy(aBuf, buf); // v1.0.47: Must be done as a separate copy because passing a size of MAX_PATH for aBuf can crash when aBuf is actually smaller than that (even though it's large enough to hold the string).
	return length;
}