Hi What's the best way to do animated graphics in VB.NET? I need to make a white square bounce around the screen... I was thinking of drawing the square then using a timer to redraw 30 times per second, then moving the square on each redraw... Is there a better way though...? I'm looking ...more >>

I'm loading a jpg using XMLHttp, but am not sure how to convert the result into a bitmap? I've tried converting ResponseText into a byte array, and then loading that into a memory stream, and then creating the bitmap from that, but it's not working. I don't want to have to create a tempo...more >>

In the following code the text will not display if I use the stringFormat in the Drawstring and will separate the two strings if I do not use the stringFormat: graph = e.Graphics; pen = new Pen(Color.Black,2); //graph.DrawLine( pen,100,100,200,100); drawFont = new System.Drawing.Font("Aria...more >>

Hi, I'm just wondering if it is possible to create an image from RTF formatted text? If it isn't possible, is there anyway of determining the height of an rtf string for a given width? I have the text in a richtextbox control and would like to set the height so that all of the text is di...more >>

Hi, I am using Web Matrix Project as .NET programming environment. Can you show me detailed steps how to import the .ocx library into the Web Matrix Project. I can't seem to be able to import other assembly than .dll, .exe or ..mcl . I am pretty new to the .NET programming environment, and ma...more >>

I would like to print an image as large as I can on any size of paper (user selected or default printer settings). The following code is based on Bob Powell's C# example. However, the image is too small Help!!!! Private Sub PrintDocument1_PrintPage(ByVal sender As Object, ByVal e As...more >>

Hi Ng, I have a panel which I want to print with the printDocument object. How can it be done? Thanks in advance and best regards, Patrick Braunschweig...more >>

Hi Ng, i have a background image on a panel. Now I want the image to be scaled to the panel size. Is this possible? Can I also make the image transparent? Thanks in advance and best regards, Patrick Braunschweig...more >>

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I made a custom runded rectangle usercontrol. I used a function i found on the internet. the function works fine(see "GetRoundRect" below). I use the fullowing code to make my usercontrol rounded.... ***************************************************** Protected Overrides Sub OnPaint(ByV...more >>

Hi, I'm painting images of various sizes into a picture box, and have the "SizeMode" property set to "StretchImage". This looks OK when the image I am painting is larger than the picturebox. But when the image is smaller than the picture box, the image seems to have some sort of filtering (bi...more >>

Hi I've got some problem doing double buffer. Here is my problem: I've got custom control on which i paint some data (chat messages, lets call it ChatControl), this control is puted on a scrollable panel. Of course i've set right styles on a ChatControl: //styles this.SetStyle(Control...more >>

Hi everyone, I have some questions, I'll appreciate if someone can answer some of they, thanks in advance!! A days ago a read in some forum that Image.FromStream improves some performance over Image.FromFile since Service Pack 1, it is really true? Now, Image.FromStream since SP1 has one a...more >>

Hi, in C#, I have a MemoryStream filled with a jpg-Image, how can I create a Bitmap from that? Thanks Friedhelm Drecktrah...more >>

Here is a C# code to draw a Mandelbrot set: http://oraclevsmicrosoft.blogspot.com/2004/11/mandelbrot-in-c.html Hope this help OracleVsMicrosoft...more >>

Hi everyone I need to know the formula used in .net for the cardinal spline since i need to generate an array of values of the curve after drawing it. Thanks...more >>

I got an exception in CreateCompatibleDIB in a stable, deployed application today -- the stack trace is at the bottom of this message. The thing is, the trace shows that none of my code was running so I'm at a loss as to what to do about it. In case it's relevant, I'm overriding a Picture...more >>

I am working on panning an Image inside a panel using the mouse move event for the picture. It is sort of working. Will someone take a look at what I have and tell me how to tweek the code. Right Now I am only working with the X axes. I fugre the y would be almost Identical to the X so I diden't ...more >>

I am trying to change the cursor in a vb windows program with the following code. Me.Cursor.Current = Cursors.Hand It is not working. Does anyone have any suggestions? Thanks, Brad Shook ...more >>

I have been struggling with this for awhile now and tried many approaches, I'm hoping someone out there can give me a hand. The problem is I want transparent controls (label, groupbox, etc) to paint on a gradient panel. The flickering come when I move a different window over my form and drag ...more >>

Hi Ng, I'm trying to imitate the Windows Form Designer in VS. Is there a method in the ControlPaint class to show this selection rectangle when you click on a control to select it?Or can it be implemented on another way. Thanks in advance and best regards Patrick...more >>

Hi Ng, i want to draw a grid on a panel and I tried out this here, but it didn't work out (I definded this in the constructor of the panel): this.SetStyle(ControlStyles.UserPaint, true); ControlPaint.DrawGrid(System.Drawing.Graphics.FromHwnd(this.Handle), this.ClientRectangle, new Size(8,...more >>

Hello, I have a DateTimePicker on my form and I need to make every Even week Red and every Odd week Yellow. Any Suggestions will be greatly appreciated (Detailed help is even more appreciated). Thanks, Chuck ...more >>

Many of you use the GDI+ FAQ or Windows Forms Tips and Tricks site every day. There are also hundreds of people who have mailed me asking for a totally basic beginners guide that assumes minimal knowledge of .NET to get started. In response to these requests I have created a new series of arti...more >>

Hi, I'm trying to turn a series of images into metafiles for use as PowerPoint AutoShapes. I've tried doing this with a simple ASP.NET application that takes an uploaded image and spits out a .WMF file, but the files it creates can only be opened by certain image viewers, and not by PowerPo...more >>

Hi all, I am currently working on a C# windows application and in that i need to do some graphics manipulation in C# .net but at certain point dont know why, i am getting the follwing sort of unpredicatable errors in my code <MESSAGE>The operation completed successfully</MESSAGE> <FUNCT...more >>

Hi Ng, i have a grid which has to be painted on a panel. This panel serves as an editor to add controls. The grid consists of horizontal and vertical lines, illustrated with dots (by the way, how can I draw dots, the line shown below consists of two dots). If I write an algorithm like this ...more >>

I am writing an application that uses remoting and the GDI graphics class to update a bitmap that is getting displayed on the Client (UI). The server receives commands from a controller over the serial port, and when a complete command comes in, it interprets it. Interpretation of these comman...more >>

Hello, In Asp.Net, i am merging two images and saving the file. I am getting the error "A generic error occurred in GDI+. " when i try to save the file. Can any one, please give me the reason for it, i had also given the write permission to the folder for aspnet user... Thanx in advance...more >>

How can i calculate where i should put my text if i want it at the bottom of a image? i have gotten so far that i can write it at the top of the image with 5px offset but i dont really know how to get the string drawn at the bottom on different images with different sizes and resolutions and so ...more >>

Hi there, I recently asked a question in the VB.NET newsgroup about resolving an issue related to using the ThemeUI. If you draw a theme part without calling DrawThemeParentBackground first you end up with a black border. Now I am making a class that loads msstyles files and draws...more >>

Hi, I’m having trouble with the GetBounds function of a GraphicsPath. See code below. The first Arc’s Bounding rectangle is just plain wrong, it’s 106.0523 wide, it can’t be any wider than 100, because thats the size of the rectangle used to draw it! The second Arc is correct and is ther...more >>

Hey Group, Today we look in to creating software digital certificates but we take a plunge in that we will look at certain aspects of Crytography. Cryptography is about keys for encryption. These keys can be symmeteric or asymmetric. When we say symmetric keys what we mean is that the same k...more >>

Hello, I am fairly new to GDI+ so forgive me if this is a simple question. I have searched on the newsgroups and cannot find an answer. In C# I am creating a new Bitmap object: Bitmap oBannerImage = new Bitmap(610, 60); Graphics oBannerGraphics = Graphics.FromImage(oBannerImage); and ...more >>

Hi, I'm trying to convert an 8bpp indexed greyscale image to a 32bpp ARGB image. The steps I follow: 1. open 8bpp image using FromFile 2. create a new 32bppARGB image 3. get 32bpp Graphics using Graphics.FromImage 4. paint the 8bpp image onto the 32bpp using DrawImage. My problem is the...more >>

How can i calculate the real life width and height of a image in mm or inch using image.width, image.height and image.verticalresolution or something? my values are always alittle off... Math.Round(((25.4 * image.width) / image.verticalresolution)) where 25.4 is one inch in mm afaik do...more >>

Hello, the application I am working on consists of a graphing UserControl and a test Forms app. The user can plot points and connect them with lines on the graphing surface of the control. The goal is to map those points' coordinates to the X,Y coordinates of the mouse when it hovers over such...more >>

Hi -- I have a very simple question, the answer of which has eluded me for quite some time: How can I draw at the topmost layer of forms and controls from .NET (or from unmanaged code, that would be fine too)?? Any GDI+ drawing I've done only appears on the background of the form/control/wh...more >>

Hi all, Ok, this is possibly a newbie question, but I'm kind of a newbie anyway, so here it goes :) I have a Bitmap I need to control through a ControlMatrix. I can easily make changes to the brightness or contrast of the picture. If I got it right, being X the elements I need to change, i...more >>

Hi, I have tried saving a metafile, using a memory stream. somemetafile.Save(m, ImageFormat.Emf); But when you specify the image format as Emf I get a GDI exception saying an internal error occured. Other types are allowed other than wmf as well. Only wmf and emf saving throws the except...more >>

Can i get image information witout loading the image. since my images are quite big it takes a while to load, and i just need to get the width, height and resolution of the image so i can calculate the size in millimeters of the image with the formula: Math.Round(((25.4 * pixels) / resolution)) ...more >>

Hi, making a application that deals with 3 image files that are quite large. they are about 8000x8000px in size, i have tryed to load them all into memory but i always get a out of memory exception so i have given up on that idea... so now i have to load one image, process it and write the output ...more >>

....is it possible to draw other things than recrangles and lines using i.e. ControlPaint.DrawReversibleXX()? How could I draw a revsersible bezier curve? Thanks! - Peder -...more >>

Hi! What are the pros and cons for creating a drawing program with either objects that draw themselves in a retained mode drawing system, or using controls derived from Control? We are creating a quite extensive drawing program and are wondering if one approach is better than another. A "pa...more >>

Hello, Can I get a character width whitout using MesureString? Thanks, Andrea ...more >>

Hi, 2 questions. 1) I created a small picture in photoshop and now im trying to add some text upon it with my .aspx program, here is the before i added the text(picture from photoshop) and when i added the text with .aspx (c#): http://www.pafo.net/view.gif What can i do to make it look ...more >>

Hi Bob! Would it be possible to get a copy of your newsletter articles? I don't know if it was a pay-service or not, but in the latter case I'd really like to read them. My email is pedery (at) ifi.uio.no. Thanks! - Peder -...more >>

I am using the following code to create a thumbnail of a jpg image, its works but the quality of the resulting image is not very good, if I do the same thing in a graphics program like fireworks its much better, does anyone know how to get .NET to make better quality images, it does not matter...more >>

Hi, I am having problems with using the DrawToDC of the MSHTML.iHTMLElementRender in a VB.net application. For some reason I am getting a "catastrophic error". I am basing the code on c# examples, and I am not sure what exactly I am doing wrong. From the C# posts it seems that the drawtodc ha...more >>

Hi All I have a function that takes 4 arguments: a point coordinate (x,y,z), an angle, and the other 2 arguments are point coordinate that define an arbitrary axis. Does anyone know how to define the 2 points (or an algorithm) that define the vector of the axis so that when I move my mouse i...more >>