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  • Use in prefixed syntax
  • Drawing functions, zoom and automatic scrollbars
  • Pattern and PHP
WindowsLinuxUniversal Windows 10 AppJavaReports and QueriesUser code (UMC)
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Stored procedures
Removes the image from memory. For a drawing performed in an Image control, the current drawing is destroyed.

Remark: The call to <Image>.EndDrawing is optional. The resources are automatically deleted when the window or the page is closed.
// Destroy the drawing found in the "IMG_Drawing" control
<Image control>.EndDrawing()
<Image control>: Control name
Name of the Image control to use.

Use in prefixed syntax

<Image>.StartDrawing must be called before using the drawing functions. <Image>.StartDrawing makes it possible to define the drawing options used on the Image control.
For an Image control:
  • The drawing functions operate on a copy ("bitmap") of the image. You can use the drawing functions of Windows (via API or CallDLL32) but these Windows functions must use the DC (Device Context) returned by <Image>.StartDrawing.
  • <Image>.EndDrawing and <Image>.StartDrawing must not be called in the same process.
    The drawing will not be displayed if <Image>.EndDrawing and <Image>.StartDrawing are called in the same process: it will be automatically erased.
User code (UMC)

Drawing functions, zoom and automatic scrollbars

The "Automatic scrollbars and zoom" option available on Image controls is incompatible with <Image>.StartDrawing. If this option is used on the Image control, <Image>.StartDrawing freezes the image in the control. The zoom and the scrollbars are also frozen. The standard behavior is restored during the call to <Image>.EndDrawing.

Pattern and PHP

In PHP, the drawing functions are based on the graphic library GD. This library is commonly used by the PHP hosting companies and therefore it is always enabled. The version of the GD library must be version 2.0.28 (or later). This library can be downloaded from the PHP site.
To enable (if necessary) this library locally, the following elements are required:
  • PHP installed.
  • the PHP.INI file found in the Windows directory must contain the following line: "extension=php_gd2.dll" (instead of ";extension=php_gd2.dll").
  • the php_gd2.dll file must exist in the directory of PHP extensions. This directory is defined in the PHP.INI file by the "extension_dir" variable.
Related Examples:
WD Magnifier Complete examples (WINDEV): WD Magnifier
[ + ] This example enables you to zoom part of the screen with a magnifier.
The maximum zoom value is set to 8.
Summary of the example supplied with WINDEV:
The WLanguge function named dCopyBlt() and the WLanguage property named ..Opacity allow you to perform a capture of the Windows desktop at the location of a window without this window appearing in the screen shot.
This example uses this tip to zoom the part of the screen found below the magnifier.
Component: wd260pnt.dll
Minimum version required
  • Version 24
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