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The _MOUSEY function returns the current vertical (row) mouse cursor position when read after _MOUSEINPUT.


pixelRow% = _MOUSEY


  • SCREEN 0 returns the INTEGER vertical text row position (from build 20170817/62 onward); older versions return a SINGLE vertical text row position. Use INTEGER variables to avoid floating decimal returns.
  • Graphic screen modes 1, 2 and 7 to 13 and _NEWIMAGE 32 bit return the INTEGER pixel columns.
  • To calculate text rows in graphic modes divide the return by 16 or the _FONTHEIGHT of _FONT characters.
  • _MOUSEINPUT must be used to detect any changes in the mouse position and is required for any coordinate returns.


  • In SCREEN 0, QBasic's ABSOLUTE returned graphic coordinates. QB64 mouse functions return the text coordinates.


Example: Highlighting a row of text in Screen 0.

minX = 20: maxX = 60: minY = 10: maxY = 24 selection = 0 'the screen Y coordinate of the previously highlighted item FOR i% = 1 TO 25: LOCATE i%, 40: PRINT i%;: NEXT DO: _LIMIT 100 IF _MOUSEINPUT THEN 'Un-highlight any selected row IF selection THEN selectRow selection, minX, maxX, 0 x = _MOUSEX y = _MOUSEY IF x >= minX AND x <= maxX AND y >= minY AND y <= maxY THEN selection = y ELSE selection = 0 END IF 'Highlight any selected row IF selection THEN SelectRow selection, minX, maxX, 2 IF _MOUSEBUTTON(1) THEN LOCATE 1, 2: PRINT x, y, selection END IF LOOP UNTIL INKEY$ <> "" SUB SelectRow (y, x1, x2, col) DEF SEG = &HB800 addr& = (x1 - 1 + (y - 1) * _WIDTH) * 2 + 1 FOR x = x1 TO x2 oldCol = PEEK(addr&) AND &B10001111 ' Mask foreground color and blink bit POKE addr&, oldCol OR ((col AND &B111) * &B10000) ' Apply background color addr& = addr& + 2 NEXT END SUB

See also

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