Cause An Event - Draw A Solid Black Line 25 Pixels From The Top Of The Form?

Jan 31, 2012

I see that the Line method is replaced with DrawLine, however; it seems like DrawLine must treated as an object as follows:

Private Sub Form1_Paint(ByVal sender As Object, ByVal e _

As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint

Draw a solid black line 25 pixels from the top of the form.[code].....

When I attempt to use this code (call it), I must somehow bring about an event, but I haven't found how to do that.How do I "call" this sub?

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How To Draw A DASHED Line Instead Of A Solid Line

Aug 22, 2010

I am graphing using Visual Basic graphics and it works.  I would like to know how to draw a DASHED line instead of a solid line.  Could someone help me with this?gphFormGraphics.DrawLine(Pens.Green, pt2, pt1)

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Jul 27, 2009

I'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.

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Feb 19, 2010

I have to draw a black line across the center of the picture from one side to the other, how do I do that. Here is the code:
Dim bmp As Bitmap
Dim x, y As Integer
Dim pixel As Color
lblLeft.Image = Image.FromFile(tbFileName.Text)
bmp = Bitmap.FromFile(tbFileName.Text)
' manipulate bmp here
lblRight.Image = bmp

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Aug 16, 2010

Under the MouseLeftButtonUp event handker store the first coordinates of the lines second endpoint. Then call the length method to obtain the distance between the two endpoints(the lines length). Fianlly display the line on the canvas and the line's length in the Length=Label. Below is the code I have so far. There are no errors, but when I run the application nothing happens.

Private Sub lineCanvas_MouseLeftButtonUp(ByVal sender As Object, ByVal e As System.Windows.Input.MouseButtonEventArg... Handles lineCanvas.MouseLeftButtonUp
Dim distance As Double
endPoint = e.GetPosition(lineCanvas)

[Code].....

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Apr 19, 2009

My goal is to iterate through each pixel determining whether it is black or white. Ideally I want to do this one row at a time (so I can count the number of black pixels in each row). This is a bitonal image.I tried to get it started, but I don't understand what value(s) I'm supposed to be polling for. The following code takes a stab at it (i.e. makes a guess as to what value I'm supposed to check) and then outputs that value to a textfile.When I read the textfile, though, it doesn't look like anything useful.This code is an attempted modification of some code found in a CodeProject article.[code]

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so in RGB black would be 0-0-0 but how would i have it scan the pixtuebox and count how many pixels show up with the rgb color 0-0-0

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Color.FromName To Return A Solid Black Color When The Function Doesn't Recognize Any Text In The String Passed To It?

Jan 29, 2012

[URL] That way if the string that is not recognised that is passed to Color.FromName it returns a SolidColor of

Color.Black = Color.FromARGB(255,0,0,0)

That way, Forms and controls that only support SolidColors are supported.Installing VB6 on Windows 7?

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Jun 21, 2012

i want to create image with width and height 64 and set all pixels to black

dim b as bitmap
b.width = 64
b.height = 64

[code]....

the code not working

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Apr 7, 2011

How would I draw a line over a Picture Box using the Paint event? I can draw the lines but they are drawn under the Picture Boxes.

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Oct 14, 2010

I'm trying to draw a solid line if VB.NET the way I can in VB.What I WANT to do is set the pentype to solidcolor, but it says pentype is read only and you have to instantiate the brush as the pen type that you want, SO ... I do this:

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Feb 23, 2012

I am using word 2010 VBA to clean up a "dot matrix" looking report.  One thing I want to do is replace a row of dashes with a solid line.  I think the code would look something like this:

count strings = "-------------------"
for each strin (i)
select string
delecte selection
move up
insert solid line
next (i)

Or if it can be done as a find and replace all that would be even better, but I cannot find how to replace a row of dashes (text) with a line object.

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How can I do the same thing with other shaped like rectangle?

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Nov 17, 2010

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I ve been thinking alot about this and I think I that there might be 2 ways to do this:

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2) Direct 3d hook with C++ (Although this is quite complicated)

So my questions are:

Btw the use for it is to detect a certain pixel on the webbrowser and draw on it.

Don't ask why since it is quite complicated and I know also how to use Send message api and I once managed to program a direct 3d hook (but for a 3d game which was based on direct x SDK) with C++ although im not sure if it will work due to webbrowsers dont work with directx.

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Feb 24, 2010

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Nov 13, 2009

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me.backcolor=color.red  'OK
me.backgroundimage=my.resources.dog 'OK
me.backgroundimage=(none) 'error
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How do I reset it back to a color? It's stuck in a picture mode.

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Apr 9, 2010

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How come this doesn't work...

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'Draws diagonal line of dot and dash on form

[Code]....

... the top part draws a line on the form but the second part does nothing. The picColorKey is a picture box on the form.

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names of pictures at left are

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PicNoseLeft
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I need to draw a line on a series of pictures: I have decompiled a movie file to 1200 pictures. I also have 1200 samples of vector data (coordinates of the line: beginning point, ending point , size of vector (length) and direction (angle)... anything). With these data I want for each corresponding picture to draw a line corresponding to this vector data for instance: picture 550 needs to get a line drawn from point (5,95) ... these are (x,y) coordinates. in direction of 5 degrees from a vertical line and length 55. Visual Basic do that? I understand there will be some work in locating the origin of the x,y coordinate system and telling the program what 'size 1' means...

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Public Class gomb
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Const hatterszin = 11395569
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[Code]...

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[Code]...

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Public Class Form1
Dim x1 As Integer
Dim y1 As Integer

[code]....

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