Icon files (extension .ico) cannot be printed by Clarion's report engine. If you want to print a window and you have icons in it (for example, inside buttons) those won't print.
Filling this option with a valid extension will replace any graphic ending with .ico with the extension given here for this particular procedure. In this example, if you set the GIF extension, any file reference found to a .ico file will be replaced with the same filename but with the .gif extension.
This option will be activated only if you tick the "Override globals" setting.
The new file has to exist in the program path, otherwise it will simply won't print. Is up to you to provide the replacement graphics. We provide this option thinking that there are many programs (like for example ACDSEE) that makes the conversion very simple and fast (normally just a couple of steps), while replacing the .ico in your apps may be very difficult.
Note: Transparent areas are not printed in a Clarion report, so if you have graphics that relies on transparent areas to look good, they need to be replaced by white areas (assuming a white paper background).