Get The Color Of The Top-left Pixel Of The Desktop Window?

Mar 29, 2010

I need to get the color of the top-left pixel of the desktop window, here's my

vb.net
<DllImport("user32.dll", SetLastError:=True, CharSet:=CharSet.Auto)> _Private Shared Function GetDC(ByVal hwnd As IntPtr) As IntPtrEnd

[Code].....

But GetPixel always returns -1. I tried to get it to work using different coordinates (1,1 for example) but no luck. Does anybody know what might be the case?

P.S. Is there any alternatives for obtaining the desktop pixel colors?

View 3 Replies


ADVERTISEMENT

Get Pixel Color Of Hidden Window?

Mar 28, 2011

Is there way to get the pixel color of the specific point of an hidden window WITHOUT to use the PrintWindow Api?[code]....

View 3 Replies

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?

Jan 30, 2009

I 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 Replies

Interface And Graphics :: Get Pixel Color Of A Pixel On Screen

Sep 13, 2007

Is there a quick way to check the color of a pixel on the screen?

View 2 Replies

Get RGB Pixel Color Of A Pixel On The Screen?

Jul 29, 2010

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 Replies

Possible To Replace A Specific Pixel Color With A Defined Color?

Mar 12, 2009

In 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 Replies

Get To Color Of A Pixel?

Oct 4, 2010

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.

View 14 Replies

Detect The Color Of A Pixel?

Jan 13, 2008

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 ?

View 8 Replies

Find A Pixel Color?

Aug 15, 2011

I 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 Replies

Find The Color Of A Specified Pixel?

Dec 14, 2011

1. 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?

View 1 Replies

Get Pixel Color From A Picturebox?

Apr 17, 2009

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 Replies

Get Pixel Color Of Label?

Oct 8, 2009

I 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 Replies

Get The HEX Color Of The Pixel The Mouse Is On?

Feb 9, 2011

The title basically states it. Is there a possible way to do this?

View 10 Replies

Get The RGB Color Of The Pixel The Curser Is On?

Apr 5, 2010

How would i get the RGB color of the pixel the curser is on?Attributor 2.0

View 2 Replies

Grabbing Pixel Color Value?

Jun 25, 2010

I'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.

View 1 Replies

Re Getting Pixel Color At X - Y On Screen

Jan 25, 2008

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 Replies

VS 2010 Set A Pixel A Particular Color?

Mar 6, 2011

I 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]....

View 2 Replies

Way To Find Pixel Color

Jul 15, 2009

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 Replies

Changing The Pixel Color In A Form?

Apr 29, 2012

How would I change the colour of individual pixels in a VB.NET form?

View 3 Replies

Detect Pixel Color Change?

Aug 21, 2010

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.

View 2 Replies

Find A Pixel Color On Screen?

Aug 24, 2009

I'm trying to figure out how I would find the color of a pixle.

Say I wanted to find RGB(255, 255, 0) and get the X, Y, position of it, how would I do that?

I was thinking of a loop with BMP.GetPixel, but I wouldn't know how to check. It's not compatable with RGB.[code]...

View 7 Replies

Find Pixel With Matching Color?

Jan 15, 2009

I am trying to make an kinda autoclicker when the desired color is found. I am using a class to make an screenshot of the screen.

VB
Public Class CaptureScreen
Private Declare Function CreateDC Lib "gdi32" Alias "CreateDCA" (ByVal lpDriverName As String, ByVal lpDeviceName As String, ByVal lpOutput As String,

[Code].....

Now I wanna make an functions that find the a pixel with the matching color I put in as RGB in 3 textboxes 1 for R etc.

View 3 Replies

Get Pixel Color At Screen Position?

Feb 11, 2010

Is there a way to get the color at a certain mouse position in the active window? I remember doing it with AutoIt Script, but I can't find any references for it in vb?

View 6 Replies

Get The RGB Color Of The Pixel At The Cursor Location ?

Nov 1, 2009

How can I get the color of a pixel at the location of the cursor? I know how to get the mouses position using MousePosition but I can not figure out how to get the pixel color at that location.

View 4 Replies

Pixel Color Not At Mouse Position?

Nov 8, 2009

i know there are 1000000 posts about getpixel but i cant find what i need. i am able to get the color of a pixel at the cursors position without a problem. I need to be able to compare that color to the color of a pixel on screen at x,y without moving the cursor. how can i go about this?

View 1 Replies

Read/Write Color Of A Pixel?

May 6, 2010

This is my first Visual Basic application. I mainly do console applications in C++ and since working with pixels seems to be difficult in C++ I preferred to use VB 2005 for that. What I need to do is to read and save the colors of the pixels of a picturebox located on a form into an array. I then will manipulate the color values and create a new picture. I wonder if somebody could show me how to do that without asking me what my code is. I've struggled the whole day and so far I've realized that to draw a pixel you should draw an ellipsoid like:e.Graphics.DrawEllipse(Pens.Red, 70, 70, 1, 1)in the picturebox_paint procedure.What I need to learn is how to read the color values, and how to initiate creating the new picture by pressing a button (because I don't want the part for drawing a pixel be in the picture_box procedure.)

View 3 Replies

Search For The Color Of A Pixel Anywhere On The Screen?

Nov 14, 2008

I searched all over the internet and i haven't found anything about getting the color of a specified pixel like 150;200

View 4 Replies

VS 2008 - Use "Go To Desktop" Function That Goes Directly To Desktop Without Minimizing Any Window

May 17, 2009

I'm working on one of my applications and I'm trying to find a way to use the "Go To Desktop" function that goes directly to the desktop without minimizing any window (This can be achieved by clicking on the Win + D buttons or on the desktop icon in the quick launch toolbar), but how can I activate it using vb? I thought about sending keys but I guess there is more offical ways to do it.

View 10 Replies

Fetch Pixel Color At Cursor Position?

Dec 15, 2011

In Visual Basic 2010, how do I fetch the color of the pixel on the cursor's position (whether it be outside the program or inside)?

View 4 Replies

Find Pixel Color And Move Mouse?

Mar 16, 2010

I have put a fair few hours into this now and have had no luck, i found this piece of code on the net that seems to offer exactly what i need.[code]...

View 6 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved