JCL Help:RectIsNull

 JCL Help: RectIsNull Function

Graphics.Rectangles

JEDI Code Library Help

• Packages
  • RTL enhancements
  • Containers
  • Developer Tools
  • VCL enhancements
• Files
  • Classes
  • Interfaces
  • Functions
  • Variables
  • Constants
  • Types
  • Records
• Project summary
• License

Search in JCL Help

 

Search in all projects

 

Summary

Tests if a rectangle is a null rectangle.

Pascal

 function RectIsNull(const R: TRect): Boolean;

Parameters

Parameters	Description
const R: TRect	The rectangle to test.

Return Value

If the rectangle is a null rectangle the function returns True, otherwise it returns False.

Description

RectIsNull tests if the specified rectangle is a null rectangle. A null rectangle is a rectangle with all it's members initialized to 0. Some functions return a null rectangle to indicate failure.

About

Unit

JclGraphUtils

Donator

Pelle F. S. Liljendal

Contribute to this help topic

This documentation wiki is based on the collaborative effort of Project JEDI users. Your edits are welcome in order to improve documentation quality: edit this page

The JEDI Code Library source code is hosted at : link to view the current source code, link to the subversion repository