I'd to draw a "moving" bitmap in a window,  essentially moving the bimap one
pixel to the left and a new vertical line all the time.
In GDI I accomplished this by doublebuffering and using the win32 call
ScrollDC. A rather efficient solution that did not require me to copy/clone

Good afternoon, ladies & gents.
I have an intermittent error occurring on my Windows Form, on which I'm
attempting to manually draw a "legend" of colors that applies to background
and foreground colors on a grid elsewhere on the form.  The error is not

In one part of a program I use ExtractIconEx and DrawIconEx.
The result is that parts of the icon display the background color - I assume
those parts are set to be transparent.
In another part I do:

If I use the a graphic object's DrawImage method I can draw, for example, a
16x16 Icon as large as the screen.
If I were enlarging a photo I might want what I get from DrawImage but for
an Icon I'd like to see the pixels (enlarged of course.) That is, I'd like

Hi everyone, I am working on a simple graphics text app, code below.
Hopefully Bob will be able to answer this one.
I cannot work out the maths to get the sheared text to start at the same
position (bottom left) as the upright text appears. You may need to play

I have a bitmap that has a transparent color of Color.Transparent.  If I save
it to a file using the Save method directly like;
mybitmap.Save("c:\mybitmap.bmp")
It is saved with the transparentcy preserved.

Dear Group,
Are there any known issues in using the GDI+ classes/methods such as
SolidBrush, Pen, DrawLine, DrawRectangle or FillRectangle - when the control
is painted in a RTL layout? Because, we are encountering unexpected

I want to build and show a state transition diagram within our
application. This will create/use an XML containing the code/
This diagram shuld be able to show start/end state nodes, activity
nodes, decision points etc. It should also have the ability to double

Pardon my rustiness, but is it possible to construct a ColorMatrix
that would set alpha for points that match a particular RGB, while
leaving alpha untouched for all other pixels?
For example, set RGB 0x123456 to 0x20, and then set alpha for RGB

I am trying to create a image object out of a bitmap file like
Image img = new Bitmap(@"c-\CurDisplayImage.bmp"); ,I found the memory
of the process is increased twice as the bitmap size , for example if I
load a 50MB bitmap the memory is increased by 100MB ,

I have a byte array of pixels. I know the size of image (512X512) and
pixelformat.
How can I create a bitmap image from this byte array?
I know it will be with bitmapdata and lockbits.

I can convert an Icon to a BitMap but I can't seem to get the Icon
Transparent color in order to make the BitMap same color transparent.  Would
appreciate any Help.

I have a user control that I paint myself.  I have a bitmap in the control
representing the control surface which I draw on then in the control paint
event, I use BitBlt to copy this background bitmap to the e.Graphics object
passed in the e.System.Windows.Forms.PaintEventArgs to ...

How can I detect if a .jpg is progressive or not?  I'm using the Bitmap
.NET class.  I see it has a PropertyItem array that stores metadata,
which I'm guessing will contain that information, but I have no clue how
to extract it.

I needed to create a batch process to convert a large number of JPGs to TIF
CCIT4 format.  I'm sure there are libraries out there to do this, but I
couldn't find any that were free.  I also found lots of source code that got
me on the right track but never seemed to solve my ...