Qb64 Manual Pdf May 2026

' DO WHILE / DO UNTIL x = 1 DO WHILE x <= 5 PRINT x x = x + 1 LOOP ' Infinite loop with EXIT DO DO INPUT "Enter password: ", p$ IF p$ = "secret" THEN EXIT DO LOOP

OPEN "data.txt" FOR INPUT AS #1 DO UNTIL EOF(1) INPUT #1, name$, age, grade PRINT name$, age, grade LOOP CLOSE #1 OPEN "document.txt" FOR BINARY AS #1 content$ = SPACE$(LOF(1)) ' allocate string of file size GET #1, , content$ ' read entire file CLOSE #1 PRINT content$ 9.3 Binary Files (Custom Data) TYPE Record ID AS INTEGER Value AS SINGLE END TYPE DIM rec AS Record rec.ID = 101 rec.Value = 3.14

IF score >= 90 THEN PRINT "Grade: A" ELSEIF score >= 80 THEN PRINT "Grade: B" ELSE PRINT "Grade: C or lower" END IF

_SNDSTOP music& _SNDPAUSE music& _SNDCLOSE music& ' free memory DO WHILE _SNDPLAYING(music&) _DELAY 0.1 PRINT "Playing..." LOOP Chapter 9: File Input/Output 9.1 Sequential Files (Text) Write to file:

img& = _LOADIMAGE("player.png") ' supports PNG, JPG, BMP IF img& < -1 THEN ' valid handle? _PUTIMAGE (100, 100), img& ELSE PRINT "Failed to load image" END IF

+, -, *, /, ^ (exponent), \ (integer division), MOD (remainder)

sprite& = _NEWIMAGE(32, 32, 32) _DEST sprite& ' draw onto sprite CLS , _RGB(255,0,0) ' red background _DEST 0 ' back to main screen _PUTIMAGE (mouseX, mouseY), sprite& SCREEN _NEWIMAGE(800, 600, 32) _DISPLAY ' start rendering DO _LIMIT 60 ' 60 FPS CLS ' draw frame... x = x + 1 _PUTIMAGE (x, 300), player& _DISPLAY ' show frame LOOP Chapter 8: Audio & Sound 8.1 Legacy Sound (PC Speaker) SOUND 440, 18 ' 440Hz for 1 second (18 ticks = 1 sec) BEEP ' simple beep PLAY "MB L8 O3 C D E F G" ' music macro language 8.2 Modern Sound (_SND Commands) Load and play: