Thanks.
1) The problem is with the library LLIBG to display image BMP
2) The compiler is exospace (not blinker..sorry)
the lines of source with display black are:
SET VIDEOMODE TO LLG_VIDEO_VGA_640_480_16
GBMPDISP(GBMPLOAD("xy.BMP"),0,0)
3) My file bat for the compiler is
clipper %1 /l
EXOSPACE @PP.TXT LIB LLIBG,CLIPPER,extend,expand,BOXMENU,rcmp_c53,artful,GT_LIB,AHELP5,nocopy,NANFOR MAP=MIO
OPTEDIT c:\ANALISI\WBSF -EXTRAMIN 4096
4) The Windows version is XP Professional SP3
5) My graphic card is NIVIDIA GeForce 9400 GT
Grazie
Ciao