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  • Special cases
  • Drawing functions, zoom and automatic scrollbars
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Stored procedures
Frees the image from memory. For a drawing performed in an Image control, the current drawing is destroyed.
Note: The call to dEndDrawing is optional. The resources are automatically freed when the window or the page is closed.
Versions 15 and later
Linux This function is now available for the WEBDEV sites in Linux.
Linux Caution: A specific configuration is required to use this function in Linux. See The drawings for more details.
New in version 15
Linux This function is now available for the WEBDEV sites in Linux.
Linux Caution: A specific configuration is required to use this function in Linux. See The drawings for more details.
Linux This function is now available for the WEBDEV sites in Linux.
Linux Caution: A specific configuration is required to use this function in Linux. See The drawings for more details.
Versions 16 and later
Universal Windows 10 App This function is now available for the Windows Phone applications.
New in version 16
Universal Windows 10 App This function is now available for the Windows Phone applications.
Universal Windows 10 App This function is now available for the Windows Phone applications.
Versions 18 and later
Universal Windows 10 App This function is now available in Windows Store apps mode.
New in version 18
Universal Windows 10 App This function is now available in Windows Store apps mode.
Universal Windows 10 App This function is now available in Windows Store apps mode.
Versions 21 and later
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
New in version 21
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Example
// Destroy the drawing found in the "IMG_Drawing" control
dEndDrawing(IMG_Drawing)
Syntax
dEndDrawing([<Element>])
<Element>: Image variable or character string (with or without quotes)
Element to use:
  • Name of an Image control to erase.
  • Versions 17 and later
    WINDEVWindowsLinuxUser code (UMC) Name of an Image variable.
    New in version 17
    WINDEVWindowsLinuxUser code (UMC) Name of an Image variable.
    WINDEVWindowsLinuxUser code (UMC) Name of an Image variable.
If this parameter is not specified:
  • all the Image controls found in the current window will be erased.
  • all the images will be freed from memory.
Remarks

Special cases

  • dStartDrawing must be called before using the drawing functions. dStartDrawing is used to define the element (Image control or Image variable) onto which the drawing functions will be applied.
  • 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 dStartDrawing.
    • dEndDrawing and dStartDrawing must not be called in the same process.
      The drawing will not be displayed if dEndDrawing and dStartDrawing are called in the same process: it will be automatically erased.
WINDEVUser code (UMC)

Drawing functions, zoom and automatic scrollbars

The option "Zoom and automatic scrollbars" available for an Image control is not compatible with dStartDrawing. If this option is used on the Image control, the display performed by dStartDrawing is fixed in the control. The zoom and the scrollbars are also fixed. The standard behavior is restored during the call to dEndDrawing.
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 : wd240pnt.dll
Minimum required version
  • Version 9
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