I have two graphics areas linked by a splitter control. The splitter uses the Dock property to specify the linking relationship. However, I find that whenever I Dock Left, the graphics area loses the vertical scroll bar. If I Dock top, the horizontal scroll bar is gone. Do you all get the sam...more >>

I already posted it to microsoft.public.win32.programmer.directx.managed, but there was no response, maybe here any one will know, thanks in advence. I'm trying to make a simple animation - white lanes on black screen are moving from left to right. I've tried to do this using GDI+ but even ...more >>

Hi, I am following Charles Pretzold's book, " Programming Microsoft Windows with C#", to create a EMF file and save the contents of this file as Bitmap. EMF file is being created, as I want . But Bitmap file is always a Black screen. What am I doing wrong ? Here is the code:- private ...more >>

How do I create a Drawing.Brush for a non-named color? The Color class has a FromArgb() function I can use, is there anything similar I can use to create a Brush?...more >>

Hi there, im trying to read an image pixel by pixel and save the information to a file for later use in another image... the images i want to read are quite big so i need it as fast as possible, ive read at http://www.bobpowell.net/lockingbits.htm and this seems fast but i cant really fig...more >>

Hi, My application receives faxed images (TIFFs), uses the MODI tool to OCR the TIFF, searches the text for various values and publishes the text to an html page. Problems occur when the OCR function doesn't capture the correct text. I imagine I would see better performance if I could sha...more >>

Hi. I have a program that creates an image and displays it to the screen....pretty simple. I put it into a matrix so that I can rotate it. I would also like to be able to know when I click on it so I am doing a rectangle.contains. This works fine if the image isn't rotated. But if it ...more >>

I am trying to start with FreeImage project, which has a C# library. When I try to add FreeImage.dll as a reference inside the Visual C# Express I get an error saying that FreeImage.dll is not accessible, please make sure that it is valid COM or assembly. Please help. What am I missing? Tha...more >>

hi everyone. i want to make a png file which is 16bpp/24bpp/8bppindexed in vs.net2003 i always got 32bpp file! why? it seems that GDI+ do not support any encoder for PNG. who can tell me how to make 16/24/8index png file? i need my file to be smaller. i know people can use libpng.dll in...more >>

Hi, I'm building a custom progress bar which uses graphic object with bitmap buffering, rectangle, solidbrush, etc. Everything seems to work fine, except that when the progress bar control is used in a real application, it slows down the whole process. Should I use a new, seperate thread 'wi...more >>

Hi Iam using ownerdraw in a Panel. Iam scaling an image so that it should fill the whole width of the control but the funny thing is, it doens't. Instead it blends from left to the right into the background of the control (seem like alpha is decreasing from left to the right). The proble...more >>

Hi! is it possible to give some animation effects in VB.Net forms? because .Net environment is naturally almost boring so animation will help to keep users diverted to my app. the effects such as dropping form from top of screen or folding or unfolding a form , covering and uncovering a for...more >>

Hi, If I were to do this on a VB.NET form ----------------------------------> the '-' is a solid line and > is the linecap. If I wanted to draw this line in incremental small steps (in slow transitions) pixel by pixel, from left to the right, and also animate its texture's colors, how to ...more >>

im trying to figure out how to make a progressbar when loading images.... im using the following code to open the file: Dim bmpInputStream As IO.Stream Dim bmpSourceBitmap As Bitmap bmpInputStream = File.OpenRead(InputFilenames(SourceImageNumber)) bmpSourceBitmap = DirectCast(Image.FromS...more >>

Hi, I am trying to implement Lasso selection, similar to one available in the Windows Explorer. I have a extended a Panel and set the style and back color : public class TransparentPanel : System.Windows.Forms.Panel public TransparentPanel() { this.SetStyle(ControlStyles.SupportsTransp...more >>

Hi, I am trying to create an image with a transparent colour. I have created a function (please see below) which creates a white image with some green text. I would like to make white the transparent colour. If I comment out the MakeTransparent line, the function works in the sense that...more >>

Hi, I am drawing an image in MFC, which has texts in it and the texts are getting drawn using CDC::TextOut and I can see text on the screen. But, when I try to print it using C# code, it prints all other things (lines,rectangles etc..), but text . Do I have to use some other function to ...more >>

Folks - I have a rather odd question. I call it odd because I can't believe it's not spelled out in the MSDN docs. Or maybe it is, and I just missed it... In looking over the SystemPens.FromSystemColor() and SystemBrushes.FromSystemColor() functions, it struck me that there's no ment...more >>

I need a control similar to Task Manager Performance chart in C#. I appreciate if anyone can help me in this regard. Thank you...more >>

Hi, I want to change the background colour of an EMF file from within my project (VB.Net) The colour is currently set to white, and I want to change it to Transparent. I am having a lot of trouble finding any relevant information on the web, including the specs for the file format. Can...more >>

G'Day, I am writting an peice of code to render rtf encoded text using GDI+. I have been able to do all the difficult stuff (parse the rtf ect.) Now the easy parts driving me insane and I'd love some help from a Graphics.DrawString(...) enthuiest. Basicly when making sequential DrawStri...more >>

Hello All, I have an application that adds pictureboxes at runtime. When I set the Image property I get a OutOfMemoryException. The images are only about 40kb each and it craps out on about the 4th one. Code Example: For I As Integer = 0 To 10 Dim PB As New Picturebox With PB ...more >>

I have the following code in C#. This does not rotate the ellipse around center. Could someone help me out here? I want to keep the center of rotation. Thanks in advance - Dan grfx.DrawEllipse(pen,50,25,384,576); Matrix X = new Matrix(); // create point of center of elli...more >>

In Framework version 1.1 this work but in the .Net 2.0 framework GetDeviceCaps returns no values (see below for a code example). For my program I need to get the margins before actually printing that is why I'm using the PrinterSettings instead of the PrintPageEventArg graphics object. A...more >>

I need to draw a RichText on a draphics object. The simpliest method would be copying content of a RichTextBox control. I can do this with BitBlt from win32 api if the richtextbox is visible, but in my case the richtextbox is only created in memory, but not showen on any control? Can anyone help...more >>

Hi, I develop a little control that daraws a string, using System.Graphics methods. Here is a simple image that will be usefull for my question. <img src="http://faze.altervista.org/temp/texts.png"> Using GraphicsPath and a little blur (with drawing a resized image), I draw the first text (the ...more >>

Hi All, I tried to extract the color from the position under the mouse on bitmap backbuffer via GetPixel.Even though the color is red, when I compare it with red,the if statement does not get executed.Why is it so??? Color colorval=backbuffer.GetPixel(e.X,e.Y); if(colorval.R.Equals(C...more >>

Hi All, I am trying to reduce the file size of an image set at 320px by 240px. I reduced it by changing the pixelformat (see below). Is there any other way of making further reductions without changing the resolution? Private Function GetReducedImage(ByRef image As Bitmap) As Bitmap ...more >>

Hi, I have an image, which is drawn in MFC and has lines drawn in other than the standard angles, but we can't implement Anti-Aliasing in MFC, as it makes drawing slow. But, I want to apply anti-aliasing in the print mode and I am printing this using C# code. So, I assumed that if I pass t...more >>

I'm developing in VB.NET on Windows 2000 and printing to a DeskJet 5550 = printer using the PrintDocument object. Why does the command: PrintDocument1.PrinterSettings.DefaultPageSettings.Color =3D False ....act like a dummy switch? I'm trying to override the Windows default = setting o...more >>

Dear all, I've a great image (DIN A4 600dpi) drawn with GDI+. I want to save the image with a minimum of memory usage. Unfortunately it seem that dotNet first makes a Bitmap and then does everything else. The following command require a peak memory usage of approx. 300MB: IWSimage->Sa...more >>

I use the method Region.IsVisible(Rectangle) to check the overlaps among = rectangles. The Codes list as following. Private mGraphs As ArrayList =3D New ArrayList Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As = System.EventArgs) Handles MyBase.Load mGraphs.C...more >>

Hi, I am trying to write an application that does some image processing and would like to give the user various options on how the image should be saved (different options for different file types: primarily JPEG and PNG for the two compression parameters mentioned). I have a two part question a...more >>

can anyone plz tell me how to zoom a part of curve selected by mouse...more >>

I'm creating a custom container control and i want to specify the size of the control's non-client area. I've done nc painting earlier using interop so i am familiar with techniques for painting into the nc area, but i've never found anything on how to set the actual size of the caption....more >>

Hi, I have a System.Drawing.Image component, in which I have an image in Enhanced Metafile Format (EMF) I would like to do the following: - Change the background of the image to Transparent (it is currently white) - Write a Time stamp in one corner of the image. I have been trying to wo...more >>

Hello All, I have created a multi-paged TIFF image using the Image.SaveAdd method. 1. Is there a nice way of retrieving the individual pages into separate images? 2. Is there a way of knowing how many pages there are? Landers ...more >>

Hi, I have an image, which has a size more than the A4 paper, so I want to take a snapshot of this picture in slices and print. The drawing code is in MFC and the printing is being done using C#. I ran into the problem, where the picture size was coming too small, when printing. I investiga...more >>

Hi all, I have an app where the user can drag an object back and forth between a panel and a ListView. So the panel and the listview are both targets and sources for the same object type. I also allow the user to drag an object from one point in the panel to another. This all seems to wo...more >>

Hi all, I am converting avi files to series of bitmaps to enhance them.How do I write this series into harddisk. Also,one more issue that creeps in is if I write these to hard disk,accessing them again in a sequence will also take up a lot of resources. Is there any way out??? rega...more >>

I have a GraphicsPath object filled with AddArc() and AddLine() methods. What I am attempting to do is actually draw this path and then flip it and draw it again to give me symetrical images to reduce code. I have looked at the Matrix object but can only seem to rotate it, which is not what I ...more >>

If I have an Image, say image1" that I'm going to draw on a PictureBox's Image or set the PictureBox.Image to it. Can I make part of the image1 transparent without doing anything to the PictureBox? That is, can either or both of the following: obj1.SetStyle(ControlStyles.Support...more >>

Hi all, I need to scan the hard disk drive/CD and search and retreive the files of likes jpeg,gif etc.Is it possible? regards Rithesh ...more >>

Hi all, When I read from an AVI stream and write a bitmap for the second frame,I get this error Process cannot access file "file_name" because it is being used by another process Is there anyway to overcome this.I also tried 'using' statement but to no avail. ...more >>

How can i play AVIs without using the Windows Media Player class in VB.NET? Please!! ...more >>

Hi everybody, I have two small bitmaps on the UI surface that have a common vertical border and the same height. I would like to combine them in one bitmap object that should depict the both in the position how they are. Is it somehow possible? Victor ...more >>

I have a myPanel class which is a simple inheritance of System.Windows.Forms.Panel on which I draw my graphics. As discussed in a previous thread, this is to get double-buffering to work. Even though myPanel is a control, scrolling doesn't seem to work even when its .Width and .Height are ...more >>

Hi all, Is there any way to read files from a CD with C#. Thanks in advance. regards Rithesh ...more >>

I'm going to build a test project to try to develop an understanding but a little prior insight would help. A PictureBox has a Background Image, a Background color and an Image. Also I can use a graphic object to draw in it. How do these relate? The Background color and Background Imag...more >>

I have a question more on C# program flow and structure rather than System.Drawing per se. I have a panel1 on which I put my graphics. panel1_Paint calls DrawGraphics(e.Graphics) where e is the PaintEventArgs passed from somewhere I don't know where (it's in the formal parameter list of th...more >>