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  • Special cases
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Stored procedures
Deletes all the drawings made since the last call to dStartDrawing.
In the case of a drawing in an Image control, the current drawing is deleted.
In the case of a drawing in an Variable, the resources are released.

Remark: The call to dEndDrawing is optional. The resources are automatically released when the window or Page is closed.
Example
// Destruction de l'image présente dans le champ Image "IMG_Dessin"
dEndDrawing(IMG_Dessin)
Syntax
dEndDrawing([<Element>])
<Element>: Optional control name or optional Image, WDPic or picLayer variable
Element to handle:
  • Name of an Image control to erase.
  • Name of a variable of type Image.
If this parameter is not specified:
  • all the Image controls in the current window will be deleted.
  • all the images will be removed 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.
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 9
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