version 6.0
The following table lists the error codes returned by the DDE_Tools routines:
| Code | Description |
| -1 | No channels available (maximum 64) |
| -2 | Invalid channel number passed to a command |
| -3 | Cannot create a DDE window |
| -4 | Target application does not respond |
| -5 | Target does not respond |
| -6 | Unknown data format |
| -7 | Invalid command |