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* If {{Parameter|imageHandle&}} is omitted, it's assumed to be the handle of the current [[SCREEN]] or write page. | * If {{Parameter|imageHandle&}} 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|screen]] window use zero for the handle value or nothing: {{Parameter|lines&}} = [[_HEIGHT]](0) ''or'' {{Parameter|lines&}} = [[_HEIGHT]] | * To get the height of the current program [[SCREEN|screen]] window use zero for the handle value or nothing: {{Parameter|lines&}} = [[_HEIGHT]](0) ''or'' {{Parameter|lines&}} = [[_HEIGHT]] | ||
* If the image specified by {{Parameter|imageHandle&}} is in text only([[SCREEN]] 0) mode, the number of characters | * If the image specified by {{Parameter|imageHandle&}} is in text only([[SCREEN]] 0) mode, the number of lines of rows of characters are returned. | ||
* If the image specified by {{Parameter|imageHandle&}} is in graphics mode, the number of pixels | * If the image specified by {{Parameter|imageHandle&}} is in graphics mode, the number rows of pixels is returned. | ||
* If {{Parameter|imageHandle&}} is an invalid handle, then an [[ERROR Codes|invalid handle error]] is returned. | * If {{Parameter|imageHandle&}} is an invalid handle, then an [[ERROR Codes|invalid handle error]] is returned. | ||
* The last visible pixel coordinate of a program [[SCREEN|screen]] is '''[[_HEIGHT]] - 1'''. | * The last visible pixel coordinate of a program [[SCREEN|screen]] is '''[[_HEIGHT]] - 1'''. | ||
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{{PageNavigation}} | {{PageNavigation}} | ||
Latest revision as of 00:40, 29 January 2023
The _HEIGHT function returns the height of an image handle or of the current write page.
Syntax
- columns& = _HEIGHT[(imageHandle&)]
Description
- If imageHandle& 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: lines& = _HEIGHT(0) or lines& = _HEIGHT
- If the image specified by imageHandle& is in text only(SCREEN 0) mode, the number of lines of rows of characters are returned.
- If the image specified by imageHandle& is in graphics mode, the number rows of pixels is returned.
- If imageHandle& is an invalid handle, then an invalid handle error is returned.
- The last visible pixel coordinate of a program screen is _HEIGHT - 1.
See also