XorPen

[Guest]

In VB 6 your could set the drawmode property to 7 (XorPen), which meant if
you drew a line twice it disappeared, is there a way of getting an equivalent
effect in VB.Net

 

[Cor Ligthert]

Tony,

For upgrade VB6 to VBNet questions is a special newsgroup

microsoft.public.dotnet.languages.vb.upgrade

Cor

 

[Guest]

This is not an upgrade issue, I am writing new code, but came to a point
where a few years ago I would have use XorPen and found there did not appear
to be any equivalent.

 

[Bob Powell [MVP]]

The ROP (raster operation) modes used in GDI are not present in GDI+. The
ControlPaint method uses GDI interop to provide a limited selection of XOR
objects with the DrawReversible<xxx> methods. The reason for this is that
easy alpha-blending is supposed to be better.

Personally, I would have liked to have seen raster ops too but we have to
live without them.

--
Bob Powell [MVP]
Visual C#, System.Drawing

Find great Windows Forms articles in Windows Forms Tips and Tricks
http://www.bobpowell.net/tipstricks.htm

Answer those GDI+ questions with the GDI+ FAQ
http://www.bobpowell.net/faqmain.htm

All new articles provide code in C# and VB.NET.
Subscribe to the RSS feeds provided and never miss a new article.