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

= _HEIGHT[()]

• If is omitted, it's assumed to be the handle of the current SCREEN or write page.
• To get the height of the current program screen window use zero for the handle value or nothing: = _HEIGHT(0) or = _HEIGHT
• If the image specified by is in text only(SCREEN 0) mode, the number of characters per row is returned.
• If the image specified by is in graphics mode, the number of pixels per row is returned.
• If is an invalid handle, then an invalid handle error is returned.
• The last visible pixel coordinate of a program screen is _HEIGHT - 1.
• _WIDTH (function), _LOADIMAGE, _NEWIMAGE
• Bitmaps