_MOUSEMOVEMENTY - QB64Official/qb64 GitHub Wiki

The _MOUSEMOVEMENTY function returns the relative vertical position of the mouse cursor as positive or negative values.

Syntax

verticalMove = _MOUSEMOVEMENTY

• Returns the relative vertical cursor pixel position compared to the previous cursor position. Negative values are up moves.
• Can also be used to check for any mouse movements to enable a program or close Screen Saver Programs.
• On Windows only, _MOUSEMOVEMENTY will continue to track the mouse when it is outside the program window.

Example(s)

MOD is used to keep vertical movement of circle and cursor inside of the SCREEN 13 window(200).

SCREEN 13, , 1, 0
DO: _LIMIT 200
  DO WHILE _MOUSEINPUT
    x = x + _MOUSEMOVEMENTX
    y = y + _MOUSEMOVEMENTY
  LOOP
  x = (x + 320) MOD 320 'keeps object on screen
  y = (y + 200) MOD 200 'remove if off screen moves are desired
  CLS
  CIRCLE (x, y), 20
  PCOPY 1, 0
LOOP UNTIL INKEY$ <> "" 'press any key to exit 

NOTE: When using the function this way, give the user a keypress exit option. Make sure the user has some way to exit that is not dependent on clicking the X button.

See Also

• _MOUSEMOVEMENTX
• _MOUSEINPUT, _MOUSEX
• _DEVICES, _DEVICEINPUT
• _WHEEL, _LASTWHEEL
• _AXIS, _LASTAXIS
• _MOUSESHOW, _MOUSEHIDE
• Screen Saver Programs