Having a hard time with this.  Essentially, I want to set all visible pixels
in the bitmap to black and then set the transparency to about .25.  I can do
the transparency with a simple ColorMatrix.  But I can't seem to figure out
how to apply a ColorMatrix to the image so that ...

How can i do to make a Pen with Null Color??
i want to use the drawCircle method to erase a circle in a bitmap...
please i need help!!

I've got an error on my program posted here. I can't fix it, I can't catch
it properly, I can't stop it, I can't recover from it, I can't stand it
anymore!!!
$100 to the first person to reply in the forum below my article post, with a

In a Image Processing project, I need to scale the bitmap image without
interpolation, just like Paint does when zooming. For example, use Paint to
create a bitmap with only one black pixel.
Then select the magnifer to zoom the dot with x8. You will see one bigger

Why is it five by five, and not four by four? What is the w (omega?)
channel for?

I'm having a strange problem. For some reason .NET Framework on some
printers prints draws text offset the graphical elements. I'm trying to draw
a table with some text and the same code produces different result on
different printers.

Just for the heck of it, a method that will decolor a bitmap,
ala XP shutdown.
/// <summary>
/// Apply a ColorMatrix to the Original to strip out the color

I have the a point[] in order to draw a polygon, but I'd like to draw a
"rounded" edge polygon.
How would I go about doing this?

I'd like to be able to outline a polygon twice (double line). For example,
given a set of points, I can draw a polygon using black as the outline
color. I'd then line to make a second outline, on the inside of the first
using a different color. How would I go about doing this?

how can i replicate mspaints fill option using gdi+. say i was to draw 3
intersecting lines to form an "A" shape and then point the fill tool into the
enclosed triangle it will fill with colour.
also if i were to draw an unclosed squiggly line and do the same thing the

Odd thing came up...  Tried to make a custom control with a transparent panel
in it.  At first, in the properties window, when I tried to set the panel to
transparent I got an error saying that it was invalid.  Next, I tried to add
a SetStyle() to the custom control that ...

I have a set of points that make up a polygon. These are typically kind of
rectangular in shape. That is to say they aren't just any kind of odd shaped
polygons .
Now, given these points, (anywhere from 4, 20 points), I'd like to draw an

I've got a goal that I would expect to be very simple to meet. I've got a
graphics canvas which I've drawn an image onto... and then I'd like to draw
text at a -30.00 degree angle, and have that text centered on the image.
I tried drawing image, then setting rotatetransform(-30 ...

I want to print the contents of a database. After I got the data in a
DataTable I put them in a printDocument, showed the printPreview dialog
(everything works fine untill here) and then print the document. The
problem is that I get a blank page. Even if there were more pages in ...

i want to convert JPG image file to BMP by using .NET Framework Class Library
(System.Drawing.Imaging)
there is a class named "ImageFormatConverter", but i couldnt find how to use
it.