It seems a little odd to me that the matrix set in
ImageAttributes.SetColorMatrix is not being used for matrix multiplication
in Graphics.DrawImage on the pixel values.
In particular the matrix,

Hello Group,
I am using the GDI and GDI+ Together. Now in my old code I've setup a
clipping region for my GDI Canvas, then I draw something with GDI+ on it.
Does the clipping region affect the GDI+ as well so that only the required

I have an image object of which I want to perform a high quality resize and
create a new Image (don't want to draw it to the screen).
I have tried using Image.GetThumbnailImage but the quality of the image
returned from this method really sucks. I know there must be a better way ...

Hi..
Please suggest me some way to draw on title bar and add new Button to title
bar. If possible give demo code.
Thanx

If I load an image using Image.Load(), and then call Image.Save() to save
the image back out with a new filename, will the image be saved in its
original format or do I have to explicitly add the ImageFormat argument to
Save?

another very strange behaviour with ellpisis and the DrawString method.
If I display the string "This is a string" with no ellipsis, there is a
certain gap between words. Let's say 6 pixels between "This" and "is".
If the bounding rectangle is smaller and ellipsis appear, the gap

If I want to support different format of image, should I derive a class
from System.Drawing.Image? But the Image class marks the default
constructor as internal.
Any ideas?

I wrote an application in vb6 to save certain items is twips. I would like to
convert those items that were saved in a Twips format to Pixels. Is there a
function or a way to convert Twips into Pixel?
thanks in advance...

My own searches have proven to be of little help in understanding the
implementation of this technology (available since Win98).
Any information that you could share on Display Driver Management Layer
(DDML) usage would be greatly appreciated.

I'm writing in C# and have developed a panel control that contains a matrix
of pushbuttons. It seems to work fine until you pull a modal dialog over the
panel. Then drawing goes berserk and you get garbage, so moving the dialog
around causes the display to look very bad.

How to determine that a loaded Bitmap is grayscale ?
I am loading a grayscale JPEG using System.Drawing.Bitmap.FromFile() and
PixelFormat property is Format8bppIndexed. It's strange to me, that
there is no something like Format8bppGrayScale in GDI+ (there is only

Folks,
   I have a scanned image which is circular, and contains a trace in the
middle of it (for those of you familar with trucks it is a tachograph
chart!).

I'm a newbie to programming and my question is:
For what is it good to draw with float values in graphic routines since
pixels are always integer.
Also I have tried the following code and ask myself if this is correct:

I'm not doing this for any particular reason, but was just playing
with specialising windows controls. It's driven me mad...
I wanted to create a control, derived from System.Windows.Forms.Panel
(though, i started with System.Windows.Forms.UserControl) that fills

Hi everyone... does anybody have any sample code for drawing vertical text
in C# using Win32 GDI?  I need to properly dispose any memory allocated too.
I was able to draw horizontal text with this code:
IntPtr hFont = font.ToHfont();