Thank you.
// --------------------------------- //
// Project: loadspritejpg
// Start: Wednesday, June 30, 2021
// IDE Version: 16.793
SETCURRENTDIR("Media") // go to media files
SETFONT 0,2
file$="any_jpeg_file_and_some_png.jpg"
IF DOESFILEEXIST(file$)
ok% = LOADSPRITEMEM(file$, w%, h%, pixRGBA%[])
LOADSPRITE file$,0
GETSPRITESIZE 0,sx,sy // return sx=0 and sy=0
DRAWSPRITE 0,0,0 // don't show the sprite
PRINT sx+" "+sy,0,0 // wrong dimensions=0
SHOWSCREEN
MOUSEWAIT
ELSE
PRINT "the file "+file$+" don't exist",0,0
SHOWSCREEN
MOUSEWAIT
ENDIF