Probably I'm missing something but what is the third bitmap for? It won't show in the following sample:
EMG
#include "Fivewin.ch"
FUNCTION MAIN()
LOCAL oWnd, oBar
DEFINE WINDOW oWnd
DEFINE BUTTONBAR oBar OF oWnd 3D
DEFINE BUTTON OF oBar;
FILE "\FWHARBOUR\BITMAPS\OPEN.BMP",;
"\FWHARBOUR\BITMAPS\CLOSE.BMP",;
"\FWHARBOUR\BITMAPS\DISPLAY.BMP";
NOBORDER
ACTIVATE WINDOW oWnd
RETURN NILEMG