Saving macro results with an extension other than .txt

[mdhiggins]

I have a macro which compiles data in a text window. I use this code to save the data.

...
print("<li> image if it is rectangular = "+area1+ " " + unit + "2 </li>");
print("<li> Crystal shape is an estimate and must be checked");
print("</notes> ");        
print("</CSD_data>  ");

run("Text...");

I want to open a 'save as' window with an .csd extension, rather than the default .txt, so that it can directly be used in another program. Any ideas?

Michael