| Variable name | Description |
|---|---|
| AddCopy | Boolean indicating whether files should be added to the copy list. |
| DoCopy | Boolean indicating whether files should be copied at all. |
| DriverDir | Path wherse link service .INF files are found. |
| IHVDLGHANDLE | Handle to SRL containing dialog boxes. |
| LF | Constant for printing newlines in dialog box text. |
| LIBHANDLE | Handle to the Setup Support Library, SETUPDLL.DLL. |
| NTN_InfOption | Which option is currently being installed/removed. |
| NTN_InstallMode | Controls installation/configuration/removal behavior. |
| NTN_SoftwareBase | Handle to SOFTWARE\Microsoft registry tree. |
| REG_H_LOCAL | Handle to top of HKEY_LOCAL_MACHINE registry tree. |
| REG_KEY_READ | Constant for read-only registry access. |
| REG_KEY_READWRITE | Constant for read/write registry access. |
| REG_VT_SZ, etc. | Constants representing data types for registry entries. |
| SNARootDir | The root directory of the machine's SNA Server tree. |
| SNAVersion | Current version of the SNA Server. |
| STF_LANGUAGE | Which human language is currently in use. |
| STF_WINDOWSSYSPATH | Path to Windows NT system subdirectory. |