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Can FAXCOMEXLib and Windows Fax Service send a color fax?

We are in the process of testing different options for sending faxes from within our C# code (receiving faxes is not necessary). One of those options is to use FAXCOMEXLib.

Without surprise, I've had pretty good success sending out black & white faxes with FAXCOMExLib. But we also have a requirement to support sending color faxes. So I execute the following code (just a snippet):

IFaxDocument oFaxDoc = new FaxDocumentClass();
oFaxDoc.Body = @"C:\Test\color_image.jpg";
oFaxDoc.ConnectedSubmit(m_oFaxServer);

The image is 24bit color, 1728x2304, 204x196 dpi.

For the most part, this process works (with a couple of small quirks) and the fax shows up in my "Windows Fax and Scan" outbox (I'm on Vista). The problem is the image has been dithered to a 1bit black & white image. I assume that what I see in "Windows Fax and Scan开发者_如何学C" is what is actually transmitted.

So is there a way to send a color fax using this technology? Are we missing a configuration option somewhere to make it work?


Finally got an answer elsewhere. Windows Fax Service does not support color faxes.


I have been using this program to transmit faxes for a year and it does not support color fax transmissions.

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