I'm developing a scanning application in VB.NET 2005 using TWAIN. The scanner returns to me a handle to a DIB. I need to save this to a file, but I've been searching everywhere and can't find any information.
View 1 RepliesI'm developing a scanning application in VB.NET 2005 using TWAIN. The scanner returns to me a handle to a DIB. I need to save this to a file, but I've been searching everywhere and can't find any information.
View 3 RepliesI want to create an object like the shape which is shown in the below picture. This picture is divided into different zones. I want to know how can I handle different events by clicking on different zones. For instance when the user click on zone 1 something is activated and when the user click on zone 2 another event is called.
View 5 RepliesI'm rewriting a VB6 application (DLL) using VB.net 2005. In my VB6 app I used "App.hInstance" to acquire the applications Instance handle. I can't seem to find the VB.net equivalence. I've found references to Handles for Buttons,Listboxs and the like, but nothing for the Application. There is no FORM associated with this DLL, so �Me.Handle� is not applicable.
View 1 RepliesHow to retrieve a Window Handle in Visual Basic.NET?
View 1 RepliesI'm trying to make a mini map for a 2d space shooter of mine; I've for the math down (I think) for when an item should appear on the mini map, but the problem is the graphic. As it stands, the graphic spills over the edge of the mini map graphic and disappears only when it's fully outside. I need it to crop the image, or at least not show it off the mini map graphic.I thought of using the sourcerect rectangle of the spritebatch.draw, but it seems to me that would only work for the right and bottom section, as I can adjust the size of the rectangle. I haven't tried this yet, but I will soon. Can the location of the source rectangle be changed in relation to the graphic that it is a part of being drawn so that I can use that to crop the left and top sides?
View 5 RepliesI wrote an application to handle a joystick with directinput. It works fine if it uses the handle of the main window but it doesnt happen the same if the handle is the one of the component that contains the joystick's operation.
I mean:
main form handle: 15
component handle (which is inside the window and the joystick needs the focus of this component to work): 25
It always work if the handle i initilizate the device is the main form (15).How can i use only the handle of the component?
We have a great book written for Visual Basic 2005 that we type code that is prepared in advance. We are using Visual Basic Express 2008 and normally this works really great; type the code run the program and it works, however I am running into a snag.
The textbook shows the following code: IN THE(General) (Declarations)AREA we are told to type the following:
' Create a Graphic object to use with the game's bitmap
Dim myGraphicObject As Graphics = Me.CreateGraphics
' Create an empty Bitmap Object
[Code].....
is there a difference between VB 2005 and VB 2008 that would be causing the errors? or am I missing something subtle maybe mistyped?
I would like to know how to use the graphic methods:
-DrawString
-DrawLine
-FillRectangle
I am meant to use these in a method called Drawgraph in order to draw a grid and bar chart. How can I go about this? What parameters do I need to send? What variables do I need to declare?
I have just started to try learning how to use Visual Basic (im running the 2008 express free version). The example im trying to get working right now looks like follows[code]...
View 2 RepliesI am programming a design surface where I add Image objects to the surface when an image is added it calls the draw objects command. It works fine I would like to figure out how to covert the object to an image to save it? Below is the draw sub used to draw objects onto the surface:
Public Sub DrawObjects(ByVal g As Graphics, ByVal Scale As Single)
Dim drawObj As GraphicObject
Dim i As Integer
[code]....
I am working with a graphics program in VB to move an image around the Form. I'm trying to create barriers that cannot be crossed. At first, I tried to represent this with a 2D array, but this proved too complicated. For now, I'm trying to create a series of rectangles. What I want to happen is when the point the image is anchored at intercepts one of these rectangles, it will either be prevented from moving or sent back to where it was directly before the image moved. I know there is an intercept command, but I've been unable to figure out how to use it in this content. The code I have is below.
Public Class Form1
Dim PlayerSprite As Image
Dim BGImage As Image
[code]....
As I said, this is to create a graphic barrier. However, I expect to make a number of these Rectangles?
i would like to be able to erase a graphic that was created.I would like to not have to redraw the graphics minus the graphic thats unwanted.Is there a way to delete a graphic?
View 1 Repliesanyone have experience doing this? when i say imaginary i mean the square root of negative one. how would i graph this?
View 2 RepliesI want to make a form to schedule the on and off time of equipment. & rows for seven days. 96 columns for 24 hours divided by 15 minutes. Each cell will be red for on and green for off. Click the cell to toggle the color. I know what I want it to look like. But I dont think using 500 buttons is a good idea. I am looking for better ideas on which direction to go. I am using visual studio express.
View 1 Replieshow do I set up a timer to load a graphic from the web to a picturebox
heres a sample graphic
[URL]
its real small so it will load fast. the link will be different but this is good enough to test with
I need it to be on a timer event to load this graphic every .... seconds, that part of the code I can do, timer events are easy. getting this graphic into a picturebox is a pain though.
You Know Your Addicted To Computers When - Your main computer is a 7 terabyte, Core2Quad 3 Ghz +, with 4 or more gigs ram, over 200 programs installed, and you would rather sit with it programming than go to the movies!
I have a converted VB6 App that would draw irregular shapes on a PictureBox when I click on a button, and these irregular shapes would persist until I either close the App or erased the PictureBox to start the display anew.I converted my App to VB.Net to do the same, i.e. draw on a PictureBox again, but the drawn lines appear briefly and then, at the end of the drawing process, when my App returns control to the Operating System in wait for another event, the graphics disappear as if erased by the App (which I don't do of course).I have created a Graphics Object associated to my Picture Box as:
Dim CurrGraphics as System.Drawing.Graphics
CurrGraphics = PictureOut.CreateGraphics
I then use the DrawPolygon and DrawLine methods to add the irregular shapes I want:
CurrGraphics.DrawPolygon(CurrPen, Pts)
CurrGraphics.DrawLine(CurrPen, Pts(I).X, Pts(I).Y, Pts(I+1).X, Pts(I+1).Y)
where CurrPen is a defined Pen, and Pts is the Points() array with the coordinates of the displayed shape. Several dozens irregular shapes are drawn and then the subroutine stops, and returns to waiting for another request from the user.What could be the prime reason why graphics do not persist in a PictureBox, and are erased immediately after they are created ?
PS: I do not use the PainEvent of the PictureBox PictureOut, as in the example given in the VB documentation (below), as the display process is initiated by clicking on a button, and I cannot relate how to transfer control to the PaintEvent as below:
Private Sub Form1_Paint(sender As Object, pe As PaintEventArgs) Handles _
MyBase.Paint
' Declares the Graphics object and sets it to the Graphics object
[code]....
I have a module that generates fill out a System.Drawing.Graphics object. I then try to print it with a event on my main form but the print preview comes out blank. This is my print page
[Code]...
i have this code which draws a continuous circle using a timer. Now I have to display it in the form which has a group box with loads of other fields and information. Now can anyone please tell me how can i add the circle into the group box as it can be displayed.Currently the circle is being displayed behind the group box which is not visible.
Private Sub Timer1_Tick(ByVal sender As Object, ByVal e As EventArgs) Handles Timer1.Tick
Me.sweepAngle += 1
If Me.sweepAngle = 360 Then
[code]....
Ok. So I have a program I have made to calculate angles. i have a line for true vertical and I need the program to draw the line at a given angle. Basically, if I put 82 in textbox1, I want the program to calculate the cordinates where that line sits on the X axis, The y axis is always picturebox1.height, So the y axis isn't important here, just the x axis.
What would I do to calculate this angle into a visual graphic?
I used e.Graphics.DrawString(String,Font, X,Y) The point of the X start from the left
X----------String-------------------end of X[/b]
My question can I make the X Starting point from the Right.
X--------------------String-----------Start of X[/b]
I am looking to build some small custom buttons. I want to keep it simple and give them a gradient backgroud and use grey colours to illustrate shapes on them. Very similar to the buttons you see in Excel/Power Point/Word 2007 at the bottom right of the screen. The buttons are next to the slider bar which increaes the view % of the screen. These buttons are grouped together and have different combinations of squares/rectangles on them for viewing options Any idea where to start with the shapes?
View 10 RepliesI need to be able to declare 12 groups of ellipses as "group A" , "groupA#", "groupB", ect. That way I can fire all the images simultaniously from outside of the paint event handler.(if possible) I have tried several ways to declare them, but the system doesn't read things the way I trying to do them. This is my first time ever with graphic activity, so I don't have anything to fall back on. I went to the Bob Powell GDI+ site, but didn't find what I was looking for. Tried google too, but don't think I'm wording things right. Thays typically always my problem, noone understands me, 'cause I lack good communication skills. Heres what I have...
[Code]....
1. Is there any tutorial to draw graphic show as the picture I upload?
2. How to draw graphic with multi-layers, so that we can do modification on peaks instead of coordinate.
I'm working on a side project which, put simply, allows for the playing of audio files of multiple types through the form or system (My.Computer.Audio.[...]). I need to grab the audio levels of sound currently playing on the system -- not necessarily what's just playing through my form.
A "full-audio graphic visualizer" if you will. However I just need a method of grabbing the data in the first place - the rest I have taken care of. The different values you see in a graphic equalizer are what I need to grab.
If you had music playing via Songbird, and started playing a podcast voice MP3 in Windows Media Player, I want to have it all-inclusive. I've looked in the My.Computer.Audio namespace, looked into Fast Fourier Transforms (which turned out to seem much more adequate for equalizers as opposed to visualizers), and more.
I have a group of graphic ellipses that I need to arrange in a group. 12 groups actually. It's a matrix for traing guitar students. I have the locations of the "G" notes grouped so far, but not under the title "G notes group". Since I can't use ellipses outside of the paint event handler, I have to rename them, I guess in the event handler...
Here's what I have so far...
Dim
GroupG As e.Graphics.FillEllipse(Brushes.Green, 84, 6, 10, 10) And
e.Graphics.FillEllipse(Brushes.Green, 84, 106, 10, 10)
e.Graphics.FillEllipse(Brushes.Green, 24, 46, 10, 10)
e.Graphics.FillEllipse(Brushes.Green, 124, 66, 10, 10)
[Code] .....
The paint event handler does not accept my attempts to declare them as a group, & this is my first ever project with graphics in an active state. I haven't found any where to turn for info, tried Google, tried bob Powell's GDI+ site, Tried some free ebooks, nowhere I have looked seem to cover this aspect. I need some direction to turn.
There are several times in my code when I need to determine the width of some text. Under VB6 I would use the .textwidth() method pretty much any time I wished.Under VB.NET it appears that the paint event is the only place I can gain access to an initialized graphics object and from that the measurestring() method.Do I have to use a flag in the paint event when want to auto-resize my splitterbar position or is there another way?
View 5 RepliesA long time ago. before .Net net existed, I used an automated and a graphical tool. It seens to me that it was made by Microsoft. Is there a graphic regression testing tool that anyone knows of?
View 1 RepliesI want to make a graphic of certain data in my program. The problem is that the zedgraph doesn't zoom out to see the dots or lines in the graphic. This is my code:
[Code].....
I've tested the codes that Zedgraph provides in his homepage, but that code only work if you call this subroutine in the form load. Instead of that, I want to make the graphic when I clic a button.
I have made a music player, using the windows media player dll but now I want to make a graphic frequency equaliser
View 6 Replies