The purpose of the code below is to scan a program of mine to detect a pixel color change. It loops through until a change is detected. It works fine for about 10-15 seconds and then I get an ArgumentException was unhandled error. So far this has happened on two different lines at separate times...
Image = New Bitmap(Rec.Right - Rec.Left, Rec.Bottom - Rec.Top)
I'm trying to figure out some simple code to detect when a single pixel changes color at a location I choose -anywhere- on the screen (ex. 100,100). Maybe with just a msgbox popup when it changes.
The visual basic program will just be hidden and running in the background.
I should be able program the rest of the program around it, I just need the detection part. That is where I am stumped.
I am fairly new to visual basic and have written this program to detect a change in a selected pixel on the screen. When the pixel changes, a sound plays every x seconds. It works fine but after a few hours of operation a possible memory leak causes it to either crash the program or the PC. I have watched the process and I can see 4k added to it every 4 seconds or so. Where this memory leak is coming from?
Here is the code:
Public Class Main
Public pointx As Long
Public pointy As Long
Public areaselected As Integer
Public TimeToPause, SecondTimer, changefound As Integer
How do i detect the color of a pixel ANYWHERE on the screen (not just in a picture or on the form). do i need a dll or something?
(politely) can someone help me write a function that returns the color of the pixel in argb?
for eg public function(x,y) as color ?
I'm trying to figure out some simple code to detect when a pixel changes color anywhere on the screen. Maybe with just a msgbox popup when it changes.
View 2 RepliesI would like to load a GIF file, and start with the first pixel and check to see if that pixel color is closer to Black, Red, Green or Yellow, then take what ever color it closest matched to and output that color as a number, 0, 1, 2 or 3. So just for a small example a 5x4 GIF would be converted to something like this: 0112223322220111332?
View 13 RepliesIs there a quick way to check the color of a pixel on the screen?
View 2 RepliesUsing this Pixels Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code]...
This will scan the whole screen for my specified colors. How can I make it scan the AxShockwaveFlash only?
I have this idea in my mind, that I can activate a window, and then scan that window for a pixel at certain coordinates.
Is it possible to do this in vb.net?
Something like:
If.GetPixel(X,Y,COLOR,) = True Then
MsgBox (Pixel Found)
Else
Loop Until Error = False
I know that won't work, but that's my idea.
for example:
im viewing a web page, and it changed to blue...(bg color was white)
is it possible for vb to monitor this?
I've got a couple of instances of a user control on a flowlayoutpanel. The user control has got a couple of controls on it, and very little / almost none of the control's original space is visible. I need to know when the mouse is inside the usercontrol. What then happens is that the border color changes (of a control in the user control), and when it leaves the control, it changes back to original state.
I tried the following:
Private Sub ctrDashboardWidgetFrame_MouseEnter(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.MouseEnter
Try
ShowControls()
Catch ex As Exception
[Code] .....
And it works, but it only works when you move over the original visible space of the user control, and doesn't work when you move over the child controls inside the user control. How I'll be able to achieve this to also work while the user is inside the full user control and not just it's visible space?
dp.SyntaxHighlighter.ClipboardSwf = '/dp.SyntaxHighlighter/Scripts/clipboard.swf'
dp.SyntaxHighlighter.HighlightAll('c7f9624a181a409ebf7e3e1f57df5ce8')
[URL]
How can I find out the pixel colour of a certain point on a web browser. For instance,WebBrowser1.getPixelColor(0,0) would get the rgb colour value of pixel 0, 0.It doesn't have to be rgb it might be hsl or whatever.The web browser is showing a local web page that is hosted on a network. If there is an error then the screen goes all grey. What I want to do is, if this does happen, display an alert message like - "An error has occurred
View 3 RepliesIn either of these (preferably Vb6), is it possible to replace a specific pixel color with a defined color? For example, if i scan my screen for 100,200,150, is there a way i can replace every instance of that with a specific color?
View 4 RepliesI'm trying to search a picture from a color or a color close to the original color and then mark it in the picture if it is in the picture. How can I do this?
View 13 RepliesHow would I make a program that can "Scan" my screen for a hex color? I want the program to scan for a hex and then move my mouse there.
View 2 RepliesA way to scan to whole screen, and find a specific color on it - and after that move the mouse over the color.
This is what i would like the process like, so you guys can have a better idea:
1. A timer that scans the whole screen after a specific color every 5 seconds.
2. When the color appear on the screen, it'll move the mouse to the x, y.
3. After that I'll run some code (i'll hopefully find out of that myself)
I actually don't care how the color should be found. If it's a RGB it will be 255, 209, 102 it should look after. Or maybe it could scan the screen after a matching bitmap. And it's not just 1 pixel I want to find the color of, it's the whole screen I'll like to have scanned for the color, and if the color is found - the program should react.
I've read all of the examples for getpixel using bitmaps. I'm not using bitmaps.
I'm drawing simple shapes to forms and pictureboxes.
I need an example of how to get the color of a pixel (x,y) for use with forms and controls.
how to get the color of a pixel (x,y) on the screen would be helpfull to.
I would like to know the exact location of the mouse by pixels.How do I detect and write the X,Y pixels?I like to do have two sets of numbers.Firs set is for the application and second set for location in the monitor.The existing monitor is 1280x1024. (I hope the code is not monitor specific.)
View 1 RepliesI currently have only used VBA up until now and I have a very small project that requires a VB.net. I have never used this language before.Here is what I would like to do:At work I have 2 different 3rd party programs that I would like to interact with each other.When a color change occurs on Program "A" at a predetermined coordinate on the screen a mouse click is called at a different predetermined coordinate on the screen causing the desired change in Program "B".
View 1 RepliesI have drawn a grid in vb2008 so that each rectangle represents a 15 min period of a day. Time slots are shown by filling in the grid in different colours using the draw rectangle method. No problem so far. Now I want to discover the colour of any given part of the grid to prevent an overdraw.
View 3 Replies1. Let's say I have two buttons, one that draws a random circle (random size and position) and one that draws a random rectangle. How do I manage that?
2. How can I find the color of a specified pixel?
i am working on a project in vb.net 2003 and i want to get the color of a pixel when i click on the image loaded in the picturebox. i ve tried anything but nothing seems to work...
View 3 RepliesI am creating a custom tooltip label. My problem is auto resizing it (particularly height).The thing to note here is that the label i am using is an infragistics label, and i can have different fonts and formatting inside the label which means i cant just measure the text height based on the font because the label will contain multiple fonts.The only thing i can come up with is to make the label the height of the screen, and then perform a loop which scans the colour of each row of pixels starting from the bottom, decreasing the label height each time until it finds some pixels which <> the backcolor of the label (which would indicate that there is some text there).This is the only reliable way i can think of to make this happen, but im having trouble finding out just how exactly to get the color of the pixel at the given point.I did find one method of getting the pixel color, but the problem was that it when i requested it in the form_load it didnt return the right color because the screen wasn't painted (i guess).
View 8 RepliesThe title basically states it. Is there a possible way to do this?
View 10 RepliesHow would i get the RGB color of the pixel the curser is on?Attributor 2.0
View 2 RepliesI've recently been working on some VB.NET programs, grab the value of the color of a pixel on my screen(Out of my WIN32 Application).
I need this so I can make a little bot that automatically pushes buttons for a online game called "JamLegends"(http:jamlegends.com). Its kind of like Rock Band, and if I can grab the color, then I can simply used 'sendkeys' to press buttons to make the bot work.
Edit: This is for a project in school. We need to make something that will make a program that will make something easier to work with or use(In my case, JamLegends). I have nothing to work with, I've researched a bit but I found nothing that can grab pixel color values.
What I want to do is get the color of a position on the screen. I'd rather not capture the whole screen if I don't have to, just one pixel's color. I was trying to use GetPixel(ByVal hDC As IntPtr, ByVal x As Integer, ByVal y As Integer) As Integer, but I can't figure out how to get the handle to the screen.
View 5 RepliesI am trying to set a pixel a particular color. The code below does not work and don't know why.
Dim myimage As New Bitmap(PictureBox1.Image)
Dim i As Integer
For i = 0 To 59
[code]....
I also checked the Microsoft's sample code for setpixel which is below, does not work either. At least, I could not make it to work. I have used it within picturebox1_paint subroutine but got nothing.
Private Sub SetPixel_Example(ByVal e As PaintEventArgs)
' Create a Bitmap object from a file.
Dim myBitmap As New Bitmap("Grapes.jpg")
[code]....
Is here quick way to find pixel color = 0 in rectangle (0,0,10,10)?For example auto it has PixelSearch ( left, top, right, bottom, color [, shade-variation [, step [, hwnd]]] )Is here quick way to find pixel color = 0 in rectangle (0,0,10,10)?
View 1 RepliesDoes anybody know how can we change color of Panel's Scrollbar in vb 2010?
View 4 Replies