The FileToClip XCMD allows you to choose a text file from a standard file dialog box. Once you have chosen the text file, FileToClip opens the file and copies its contents to the clipboard. You can then paste the text into a field, into another application running concurrently under MultiFinder, or into a desk accessory (such as McSink).
If an error occurs, FileToClip will return an error message as the result. Word 1 of this message will be "Error". If the text was copied successfully, FileToClip returns the full pathname of the file as the result.
If you want the text to go directly to a HyperCard field without having to paste it manually, use the FileToField XCMD.