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  • Use in prefix syntax
  • Drawing functions, zoom and automatic scrollbars
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Stored procedures
Deletes all drawings made in Image control since the execution of the <Image>.StartDrawing function.
Remark: The call to <Image>.EndDrawing is optional. The resources are automatically released when the window or Page is closed.
Linux Caution: A specific configuration is required to use this function in Linux. For more details, see The drawings.
// Destroy the drawing found in the "IMG_Drawing" control
<Image control>.EndDrawing()
<Image control>: Control name
Name of the Image control to be used.

Use in prefix 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.
WINDEVUser code (UMC)

Drawing functions, zoom and automatic scrollbars

The "Automatic scrollbars and zoom" option, available for Image controls, is not compatible 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 when <Image>.EndDrawing is called.
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: wd280pnt.dll
Minimum version required
  • Version 24
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