On win32 systems both RequestFile and RequestDir return directory paths with backslashes "\" instead of forward slashes "/" like all the other file and directory functions.
' requestfile.bmx filter$="Image Files:png,jpg,bmp;Text Files:txt;All Files:*" filename$=RequestFile( "Select graphic file to open",filter$ ) Print filenameHaving a quick look at the source I think this can be solved by a call to FixPath.