_HEIGHT - QB64 Wiki

_HEIGHT

From QB64 Wiki

Jump to: navigation, search

The _HEIGHT function returns the height of an image handle or current write page.


Syntax:

result& = _HEIGHT[(imageHandle&)]


Description:

  • If imageHandle& is omitted, it's assumed to be the handle of the current write page.
  • To get the width of the current program window use zero for the handle value: depth& = _HEIGHT(0)
  • If the image specified by imageHandle& is in text mode, the number of characters per column is returned.
  • If the image specified by imageHandle& is in graphics mode, the number of pixels per column is returned.
  • If imageHandle& is an invalid handle, then an invalid handle error will occur.
  • The maximum pixel coordinate of a program screen is one less than what the function returns.


Example: Displays the current program window area.

SCREEN 12 wide = _WIDTH deep = _HEIGHT PRINT "The program screen is"; wide; "X"; deep


See also:



Navigation:
Go to Keyword Reference - Alphabetical
Go to Keyword Reference - By usage
Go to Main WIKI Page
Views
  • Page
  • Discussion
  • View source
  • History
Personal tools
  • Log in
Toolbox
  • What links here
  • Related changes
  • Special pages
  • Printable version