I'm trying to create a 256 color paletted based PNG image, and am amazed at
either how difficult this is, or how stupid I am.  Any pointing in the right
direction would greatly be appreciated.
Since creating a bitmap using Format8bppIndexed, you can't use SetPixel,

(Type your message here)
How to make one color transparent in Image through Vb.Net for a vba application .The Image is on the word Document and i have to make one color transparent through .net coding.
Any idea Pls Help!!!!
--------------------------------

as far as I know the gif image format is still not free and developers have
to pay a fee if they dont want to infringe the copyright.
Therefore I was surprised that .net provides a gif-converter in the GDI+
(Image.Save [...], System.Drawing.Imaging.ImageFormat.Gif). Because of the

I use a GraphicsPath to generate a Region, which is then used for hit
testing.  The problem I have is that when I use GraphicsPath.AddPolygon, the
region I get is hollow, so any hit testing inside the polygon fails.
Is there a way to fill the interior of the polygon path, the same ...

All,
   I have a PrintDocument that has 2 pages.  The 1st page needs to be
Portrait and the 2nd page needs to be landscape.  Inside the PrintPage()
event, I've tried setting the e.PageSettings.Landscape property, but it

I am drawing a contour plot, which is currently grey scale, using all
256 greys.  I would like to try using colour instead, but cannot
determine a suitable color scale (for instance if I use all colours
between 0 and 16777215 it looks very bad).  Can anyone suggest

I have big performance problem
with drawstring!
I draw lots of strings in a panel window, memorized in a matrix rows,columns. Every time it needs to repaint all panel (using invalidate method), the update is too slow. I've already used double buffer to avoid flicker, substituted ...

We are implementing a large gui project with all custom UI components.  Many of these components have to take on the background of its containing component due to irregular shaped buttons and labels which we need to use a common panel-spanning background image
Currently we are ...

If I have a form with a background image on it and then place a panel over
it, I can make the panel transparent by setting it BackColor property to
include an alpha component.  For example, If I set the BackColor (for
example) to 128,255,0,0, it is a nice transparent red panel and I ...

I'm developing a C# windows application and facing flickering problem. I've tried using double buffering by drawing to a bitmap first before drawing to screen. That solves part of my problem (those that I manually draw to the screen) but not all. I still find those child controls ...

How can I draw a single pixel with the graphics object? Lines seem to be a
minimum of two pixels, rectangles too. Is there a method for drawing pixels?
If the answer is obvious forgive me I'm new to this.
Thanks in advance,

how can I extract an icon from a fil
for example this sentence
"F:\WINDOWS\System32\shell32.dll,3"
how can I extract icon nr 3 from the shell32.dll??

Im not sure this is right group, but i will ask my question.
In a student project, i need to make a small drawing application in C#.NET.
The requirements are that it must be possible to draw text and to group
different texts by drawing a frame with a visible label around the text.

[modified repost with additions]
Hi,
I set the TransparencyKey of a Form = Color.Green. Why doesn't the following
code create a transparent client area?

I discovered something curious today.
By accident I wrote (I'm using VB):
System.Drawing.Color.Blue.Red
instead of