The network driver can provide a variety of error-handling functions to let File Manager and Print Manager retrieve additional information about errors that occur over the network.
| Function | Description |
| WNetGetError | Returns the status value (including error value) for the most recent network operation. |
| WNetGetErrorInfo | Returns a text string describing the most recent network error. |
If appropriate, File Manager posts error messages whenever an error is reported by a network driver function. If the error value is WN_NET_ERROR, the WNetGetError and WNetGetErrorText functions will be called to allow the network driver to return a network-specific error. If these two functions fail or are not implemented, a generic message will be used instead. Some functions, such as connection dialogs, are allowed to post their own messages as part of processing the dialog box. File Manager never posts error messages if the return value is WN_SUCCESS, WN_CANCEL, or WN_CONTINUE unless otherwise noted.