Send and receive faxes from .Net using the InterFAX Fax API
The InterFAX accepts files in all popular Office formats, including PDF and HTML, and sends them to a fax number you specify. The fax API offers basic fax send/receive, and advanced features such as multiple destinations, deferred transmission, document resolution, and more.
- No hardware installations
- No software setup
- No phone lines to order
More .Net Code Samples
.Net Fax – Send a fax and check its status »
This is a more advanced .Net code sample to show how to send a fax and then check the status of a fax that was submitted until the…
Net Fax – Send multiple documents as a fax »
This is a more advanced .Net code sample to show how to send a fax with multiple documents.
.Net Fax – Retrieve new inbound faxes and download fax images »
This is a more advanced .Net code sample to show how to retrieve the list of inbound faxes, download the fax images and mark the…
C# Fax – Sending a Plain-Text File Using SendCharFax »
In this sample, you learn how to perform a simple transmission of a fax with C#, using the inbound Web service’s…
C# Fax – Send Large Files Using UploadFileChunk »
This sample demonstrates how to upload a large file and then send it as a fax using C#.
C# Fax – Query Submitted Faxes Using FaxQuery2 »
The FaxQuery2 method demonstrated in this sample allows…
C# Fax – Retrieve the Image of a Previously-Submitted File with GetFaxImage »
This sample demonstrates the GetFaxImage method, which…
C# Fax – Cancel a Submitted Fax »
This code sample uses the CancelFax method to cancel a…
.Net Fax – Send a fax with a large file »
This is a more advanced .Net code sample to show how to send a fax with a large document.
.Net Fax – Cancel outbound faxes in process »
This is a .Net code sample to show how to retrieve the list of all faxes submitted and cancel those faxes that are still in process.
.Net Fax – Mark inbound faxes as unread and resend notification emails »
This is a more advanced .Net code sample to show how to retrieve information for a specific inbound fax, resend the email notifications…
C# Fax – Send Faxes to Multiple Recipients Using SendfaxEx_2 »
This sample explains how to send one or more C# faxes to one or more recipients using the method…
C# Fax – Get Fax Information with FaxQuery »
This sample shows you how to retrieve information for one or more submitted C# faxes using the…
C# Fax – Retrieve the Image of a Received Fax with GetImageChunk »
This example shows you how to retrieve the image of a received (inbound) C# fax.
C# Fax – Get List of Submitted Faxes »
In this sample, you retrieve a list of submitted (inbound) C# faxes using the GetList method.
InterFAX Developer Resources

Get up and running in minutes, using libraries for Java, .Net, PHP, Ruby, and more
