is it possible to choose different colors of different pixels on the background property of a form in vb.net?
i would like to clarify that i do not want to use an image to color the form.
i have a transparent form that will need to detect all the black colors behind it
I'm having some trouble with getting my code to scan a specific pixel on my screen for a specific color, and then react when the right color appears. Here's what I'm trying to do:
I have 3 hotkeys. Each hotkey starts a scan for a specific color (lets say #244FA3" ect.) and all 3 searches is looking/searcing for the colors at the same pixel/spot on the screen (lets say x=600, y=700).
Each of the seaches has its individual timer, so the code is actually the same in each timer - it only needs to search for a different color. Each timer is activated by a hotkey.
I just can't figure out how to search for the color at the specific pixel, and then react when the color is found. And it should be fairly fast (search like every 0.1 second after it's activated)
I'm trying to find the colors of pixels using GetPixel(x,y) with bitmaps.
I understand how to use it and it works.
When I use .ToString I get the string version of the color.
Now when I use .ToArgb I get a negative number and the colors are backwards?
16777215 should be white and 0 should be black.
This is an example of some results:
-16273900 is showing close to black and -32567 is showing close to white.
I want to replace every black pixel in "file.bmp" with transparent pixel
Dim b As Bitmap = New Bitmap(64, 64)
b = image.fromfile("c:/file.bmp")
For y = 0 To 63
[Code].....
How can I replace black pixels with transparent pixels?
I'd like to check for all colors in an image. I've already came up with this:
Code:
Dim lst As New List(Of Color)
Dim img As Bitmap = System.Drawing.Bitmap.FromFile("C:image.jpg")
For x = 0 To img.Width - 1
[code]....
Unfortunately this needs to sweep through all the pixels, and it's EXTREMELY slow... method to get all colors in an image without sweeping through all pixels?
How can I display a color dialog with a list of known web colors for the user to choose?
E.g.
black
white
dimgray
gray
darkgray
silver
etc.
I need to display ALL web colors
I have an option for the user to choose their own background for the application. How do I then make the image save in the settings for the next time the user starts the application? (This is actual pictures not solid colors).
View 7 RepliesI'm attempting to do something that I know should be simple but I keep messing it up somehow. First, I'm attempting to change the font color using the color in the font dialog box, but the color will only work with the next character entered into the rich text box. Second, I'm trying to use a button to switch the font and background colors.
View 1 RepliesI am using several instances of a panel object I am creating.I would like to be able to draw a diagonal line from the upper right to the lower left corner of some of the instances.I have been able to create the panel with a background image that has a white line on a transparent background, and I can switch it on and off, but I would like the line to have the active text color.How can I make an image object that uses the system palette?
View 6 RepliesI'm trying to make a -what i thought would be simple app.My intention was to build program that:1) i'd provide a grayscale image2) the program would count the black pixels the grey pixels the more grey pixels etc. (the hue) and the white3) would make the percentage sum of all pixels, that is: 300.000 black pixels (rgb 0 0 0) etc. given that 0 is the black, 100 the white. e.g a simple grayscale image is 55.2 white
This was my way and i don't think that is useful:
First of a button to convert the image to greyscale:
Dim bm as new Bitmap(source.Width,source.Height)
Dim x
Dim y
[CODE]...
Secondly, -and that's the stupid way- i did -or better i wanted to do- this: i put the code to dynamically create labels, each label having the colour of a pixel as background colour and as text the colour converted to rgb
The third step which i intended to do (i couldn't get pas two) was to sum up the labels etc.
I am trying to use a background image for one of my programs and I get this error when I try to make the BackColor Transparent. It allows me to use the Background image I want but I get this error when I try to change the BackColor to Transparent. A Box pops up that says "Property value is not valid.", then when I click Details, it says "Control does not support transparent background colors."
View 9 RepliesI want to replicate what I have with a Mac application. I want to fill the background area of a
PictureBox with grids as shown in the following screenshot (right below the blue arrow).What I have is a simple translation of the code that I use with this Mac application to create the background area, which doesn't quite work.Private Sub PictureBox1_Paint(ByVal sender As System.Object, ByVal e
As System.Windows.Forms.PaintEventArgs) Handles PictureBox1.Paint
Dim g As Graphics = PictureBox1.CreateGraphics()
Dim i, j As Integer
For j = 0 To Math.Ceiling(PictureBox1.Height / 20)
[Code]...
Onion is a recent refuge from Mac OS X and hates Mac App Store. System: Windows 7 x64
I am trying to figure out how to print a string of text inverted so the background would be black, and the text would be white. Is there any way to do this using drawstring? Been looking around, but am not getting anywhere.
View 3 RepliesHow do I give the user a color chooser for the background of a form or anything else? I would like to be able to give him all colors in vb.net.
View 2 RepliesHow can I create alternating background colors for listview rows while only using ItemTemplate? I don't want to use AlternateTemplate because I would have to edit both of them everytime I want to change something when all I'm using it for is to create the alternating background colors. So what's a way I could do it using only the ItemTemplate?
View 4 RepliesAlright inside of a combo box I have a list of colors and I want to change the background color of the combo box to the selected color...basically this... but im not sure what the problem is here anyone have some advice or is this not possible?
CBLinerColor.BackColor() = CBLinerColor.Items.Item(0)
Basically i want dynamic code that will change the color depending on the items in the box.
I am currently working on a family project which is based on "Who Wants To Be A Millionaire?" show. There is a huge diffrence between the show and my project. My project is a christmas edition and the goal is not to get money or something, since I will not add it... Erhmm... Let me get to the point. I have already designed a layout and scripted some things. I have about thirty questions but I do not want them to always spawn in the same array, if you know what I mean. I want the program to randomly choose one of those thirty questions and NEVER choose the same question in the same program run. By the way, there are four options on my project: A, B, C and D. I have got everything, I just need a code.
View 3 Repliesi have a problem with the Size in VB.Net I think the Control Size in VB.Net Is Pixels so I want to enter this size cm/inch
I want To Convert Pixels to cm/inch or cm/inch to Pixels
Background of form: black
background of char, bombs and shrooms: transparent
picbox behind char, bombs and shrooms is regular (marioland)
How can i fix it so the transparent parts dont see form as background but marioland as background?
I am using query from a SQLite database as the AutocompleteCustomSource for a ComboBox. Also, I want to load data in separate thread. My LoadData method works fine when called directly, but it fails when it is called from the BackgroundWorker thread. When it is called from the background thread, it throws a Specified cast is not valid exception on the csearch.AutoCompleteCustomSource.Add(hh("Taj")) line. Below is my code:
Sub LoadData()
Dim connetionString As String
Dim cnn As SQLiteConnection
[Code].....
i`m trying to find in cm or mm the area of a frame (capture image).The picturebox has dimensions height:456 and width:553 PIXELS.So the total number of pixels are 456 x 553 = 252,168
If i compare image 1 with image 2 i can locate and draw a rectangle around that area of pixels that are different.i can get the width and the height of this rectangle in PIXELS.e.g Height:49 Width:33 PIXELS
How can i covert these into cm or mm. What i need to know for the conversion?
I know dpi: dots per inch but what`s the value for my rectangle?
I would like to believe that this code will display a horizontal line halfway across the PictureBox pbxData. In fact, what it does is create the BitMap and then blow up with a memory violation when trying to copy the BitMap into the PictureBox. The code that alters the array is commented out because I don't know how to address the elements of the array.
how to make this into useful code?
Imports System.Runtime.InteropServices
Public Class Form1
Private b1 As Bitmap
[Code].....
How can we get the pixels of an image in a fast way?
View 1 RepliesWas just wondering if there is a way to quickly clear all pixels in a bitmap without creating a new one?
View 1 RepliesIs there a way of converting pixels to points? The dimensions in VB are in pixels, but Office COM such as WordApp.Resize are expressed in points. So trying to align app windows is a mess.I guess the ratio of pixels to points varies from one monitor to another(?), so this would need to be calculated at run time.I tried a nifty trick of doing Me.Font.SizeInPoints / Me.FontHeight but that doesnt seem to be quite right or a very sensible way of doing it.
View 2 Replieshow can i get a full code or full information how to work with image and pixels i want to work with image by pixels as integer number not as color?
View 5 RepliesIs there a "MOUSEEVENTF_Click"? Also,How would I change this code so that it will click when I move/click my mouse wheel?
If MOUSEEVENTF_WHEEL Then
Call mouse_event(MOUSEEVENTF_LEFTDOWN, 0, 0, 0, 0)
Call mouse_event(MOUSEEVENTF_LEFTUP, 0, 0, 0, 0)
End If
EDIT: How would I move the mouse down? Like -10, -10 pixels? or something like that.
i made this class to get certain pixels from screen:
[Code]...
Now i have lets say and array of pixels Example: Pixel 1 position X:100 Y:200 Red: 200 Green: 30 Blue: 40 Now i need to search all the sreen to find that pixel witout knowing its position. I need to have an output of number of results found and their position tnx.
I have a form that starts at a specific point (the right side of the left screen on an extended desktop). I am trying to work with users with different resolution. Insteadof changing the resolution to match the application, I want to try and get the size of the desktop (1280 x 2 for an extended desktop, 800 x 2 for a different resolution) and set the form to the same point... the inside (right side) of the left screen on an extended desktop. Is there a way to tell how long the desktop is from left to right and top to bottom?
View 2 RepliesThis explains a lot why I was having much trouble determining the color of pixels. They are inverted!
Dim cursorpos As Point = Cursor.Position()
Dim hWnd As IntPtr = GetDesktopWindow()
Dim hDC As IntPtr = GetWindowDC(hWnd)
Dim i As Integer = GetPixel(hDC, cursorpos.x, cursorpos.Y)
Dim c As Color = Color.FromArgb(i)
ReleaseDC(hWnd, hDC)
Label6.Text = c.ToString
Label8.ForeColor = c