Draw Line From One Point To Another Point?

Apr 10, 2012

I have a DataGridView that will occasionally have a RowError icon displayed in the RowHeader (shown below)I have code that displays a small form when the users mouse moves over the row header or clicks the row header.I would like to draw aline from the top-left of the form to the middle-right of the row header.I basically want to point from the form to the error icon.

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Finding A Point On A Diagonal Line When Have The Start Point And End Point Of The Line?

Feb 14, 2011

I have a Diagonal line drawn on a picture box on my forum and i need to know if the user has clicked the line I have the Start point and End Point of the Line and the mouse x,y location So i basically need to find out if the x,y of the mouse is on the line.

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Draw Arc From Start Point, End Point And Radius?

Jan 17, 2009

I want to make a drawing application which needs a few drawing functions I cant handle myself as im not very mathematicly inclined The first on the list of functions is to create an arc from a start point, end point and radius. The method signature is as followes.

Function CreateArc(byval StartPoint as PointF, EndPoint as PointF, Raduis as single) As PointF()
'Code to create an array of points...

[Code]....

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Maze Each Time - Draw Line(+ A {} At Each Connecting Point)?

Aug 3, 2010

i wanta like is like a maze each time u click it exendese the line.the promblem is the walls and well i dont know how to draw line(+ a {} at each connecting point) and have the line not be able to pass the wall and if it pass it, it able to detect the shorts path of lines which u can set it on if off. for the training session.

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VS 2008 Set A Point Without Setting Point.x And Point.y Separately

Jun 4, 2009

I hve been working with points a lot recently, and I have been wondering if there is a way to set a point without setting point.x and point.y separately. For example for (3, 5): Point1 = (3, 5) But that isn't right

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VS 2010 : Search For Text Within A String (Starting Point And Ending Point)?

Dec 31, 2010

I'm trying to extract a piece of text from within the string, defining both a starting point and an ending point. For instance, say I want to search for the text found between "That is a " and " car" in the string "That is a red car", so it would return "red".I know you can use .SelectionStart and SelectionLength, but the length of the word can change, so the selection length can vary. What I want is to establish a specific starting point and a specific ending point from which to extract the text from the string.

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VS 2010 Loop In A Variable And Grab Info From Point A To Point B?

May 24, 2010

I want to know if its possible to loop in a variable and grab info from point a to point b

This is what I have stored in my Variable

PHP
</div> <!-- div reviews end white-space:nowrap; margin-bottom:5px; class="reviews" -->
<div class="list_address">

[Code].....

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Add Point And Delete Point When The User Clicks The Picture?

Jul 29, 2009

i have a picturebox which displays a map i have 2 modes add point and delete point when the user clicks the picture it creates a point on the picture where the user has clicked that works perfectly its when i try and delete the point when it doesent work :/ i have all the points loading from an xml file this is the code i have:

[Code]...

basicly i want it to when the user clicks the point it fines the x any y in the xml delete the node then delete all the points on the map then reload them all according to the xml

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Calculating Point-to-point Directions On A 2-D Grid?

Mar 11, 2012

I'm trying to calculate the direction between two points on a two-dimensional grid. Actually I want to determine if that vector is within a range of two values. Suppose the grid's origin is 0,0 at the upper left corner, and 0 degrees represents north. I have a point A on that grid. I want to know if a line from point A to point B on the grid is within a range of directions between 111.8 degrees (a little south of east) and 158.2 (a little east of south). Those are approximations; the 111.8 is 90 degrees plus the arctangent of 2/5, and 158.2 is 180 minus that value. I worked out a series of calculations worthy of a medieval astronomer, but I suspect there is a simpler way. I'm going to have to do this for a variety of other vectors, and I'd like to generalize

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Construct An Icon Setting Point By Point

Feb 20, 2010

I know how I can construct an icon setting point by point, but that isn't what I want. I want to use a bitmap file or a jpeg -is easy to convert an jpeg to an bitmap- and built an icon that looks like this picture.

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Move From Point A To Point B Along An Angle?

Mar 14, 2009

I need to move an ellipse from a known point on the screen to another known point on the screen.

I've tried using For.....Loops with less than desired results.

I can't remember everything I've tried, a lot of trial and error has been layed to waste. Lol

I've ended up with this code after putting together what I've tried, what I've learned elsewhere, and a couple of posts I've read on here.

All I want to do is move the ellipse from one point to the other along a straight line that forms the angle between the two points (X1,Y1) and (X2,Y2), make it grow from 2 pixels at it's start, to about 80 pixels by the time it reaches half way, then shrink from 80 pixels back down to 2 pixels by the time it reaches the point (X2,Y2).

Easier said than done.

Here's what I have at the present.....

Dim W As Integer
Dim H As Integer
Dim Num As Integer

[Code].....

....This seems like such a simple task, yet it's been a week since I came up with the idea, and I've had little success.

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Moving From Point (200, 100) To Point (300, 400) Repeatedly?

May 9, 2010

come out with the codes for moving the mouse pointer from point (200, 100) to point (300, 400), repeatedly. Using VB 2008.

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Scrape HTML, From Point A To Point B?

Jul 28, 2010

I looked around the forum can't find something really simple.I want to scrape everything between the

<!-- google_ad_section_start -->
to
<div class="ad_editorial-sponsorship"></div>

copy it and use it right after it's website and I navigate using webbrowser1.

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(GAME)rotate Image Facing Mouse Cursor, Move Image From Point A To Point B?

Jun 21, 2010

i want to work on a shooting game,and i already have a code for the rotation of the image but i have a few problemFirst problem(for the tank /ship): i want the image to AUTOMATICALLY rotate facing the mouse cursor,i know how to rotate but but i dont know how to convert the location of the mouse to an angle that the image will face,,

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Working Out The Point Positions Along A Straight Line?

Jul 22, 2010

I have two points (x1, y1) and (x2,y2) and have a straight line between the 2 points, from this I can work out the distance between the 2 points lets say it is 50.What I want to do is increase or decrease the length of the line by a predefined amount lets say 10.So If I increase the line length by 10 (from 50 to 60), What I want to work out is what point(x3,y3) would be at the end of the increased line.Hope this makes sense.I have tried to work out the new point using the angle but it does not work correctly, it does not seems to produce a perfectly straight line and the angle from point (x1,y1) to the new (x3,y3) is not the same as the angle from point (x1,y1 to x2,y2).

This is what I have tried:
:I work out the angle
aAngle =Math.Atan((Y2 Y1) / (X2 X2))

[code].....

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Find Line Intersection Point With A Grid Of Lines?

Jun 4, 2009

I am suing VB 2008 express edition.

I am trying to solve this problem since many days. The problem seems to be rather mathematical, but I faced difficulties dealing with Grids and how to store them using visual basic.

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In my problem, I have a world of 200 x 200 units divided into 4 x 4 grids (Each of 50 units).

There is a line crosses some areas has the coordinates of Point A (Starting Point) of (XA = 12.43, BA = 159.48) and Point B coordinates (Ending Point) of (XB = 112.95, YB = 20.95).

The question is, how can find the length of (A to C1), (C1 to C2), (C2 to C3), (C3 to C4), (C4 to C5) and finally (C5 to B)?

In addition, how can I indicate the square in which the line is inside?

note that the method should work for all conditions (-ve and +ve line slopes) and for different A and coordinates.

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Calculate The Width Of That Triangle At 1/3 Of The Distance From The Point + 2/3 Of The Distance From The Point?

Mar 30, 2012

assuming i have an isoceles triangle, where i know the height + base width, how

can i calculate the width of that triangle at 1/3 of the distance from the point + 2/3 of the distance from the point?

i thought it'd be simply 1/3 base width + 2/3 base width, but my drawing is +/- a few pixels when i resize it?

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Convert A 3d Point Into A 2d Point?

Jan 16, 2010

How do yo convert a 3d point into a 2d point that can be displayed on the screen? This is the basic code that I need:

Dim ScreenXCoord as integer
Dim ScreenYCoord as integer
Private Sub ConvertPoint(PointXCoord as integer, PointYCoord as integer,

[Code[,,,,,

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Get The Point Of The Sub?

Apr 13, 2010

If (mybyte And &H80) = &H80 then

I'm interested in this line mostly but the full sub is below. I get the point of the sub. It is turning hex D5 into binary but I can't figure what this line is doing. It looks like it's saying if (213 And 128) = 128 then... I don't understand the comparison or math or whatever.

Dim mybyte As Long = &HD5
Dim x As Int32
For x = 0 To 7

[Code].....

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How To Use Map Point API

May 17, 2012

I work for a Aerial advertising company, and am trying to build a app that will measure a distance from one zip code to another, and then spit out a price (like if somebody wanted to fly a "Please Merry me" banner for their girlfriend) based on that distance (in air miles, not road travel). I guess I will have to use a Map api, but how in the world do I do this? I have built a very basic app, so I know some progamming, but I have never used a API.

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Dns - Know Where The Domains Point?

Mar 14, 2012

If I ping [URL], for example, I got:

[Code]...

That means [URL] points to 173.194.38.130 How to do so with vb.net?

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End Point Not Found

Oct 7, 2011

In created a small window's form app and when I try to install it on a cpu running Vista I get the following error when I run the app:"the procedure entry point lstrcpyml could not be located in the dynamic link library MSDART.dll"

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Exclamation Point (!) - What's The 8.0! Mean

Oct 27, 2010

The following code is designer generated:

Me.lblXRay.Font = New System.Drawing.Font("Arial", 8.0!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))

What's the 8.0! mean?

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Get The Second Decimal Point?

Mar 23, 2011

How to get the second decimal point?

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Point A Row In Datagridview?

Jul 14, 2010

ID is entered to a textbox and want to locate the corresponding row in the datagridview. And show up in that row (select that row) on the screen.

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Set Entry Point In Dll

Mar 25, 2009

i know it might be impossible to achieve (as i've been reading from another articles) but does anyone know how to set a dll entry point in VB.net project? I have created a VB.net dll and trying to call that dll from cobol (unmanaged code). in Cobol, i can only use the entry point statement to call VB.net dll (cannot add reference to it). as consequence, i'm getting "called program not found" (or in VB error is equal to "can't find dll entry point")

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Setting The X And Y Of A Point?

Apr 6, 2012

I have this code for placing food in my snake game, but it is not working. It says the structure 'system.drawing.point' has no default property.

Public Sub PlaceNewFood(Optional ByVal EmptyCell As Boolean = False)
Dim rng As New Random
Dim fx, fy As Integer

[Code].....

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.net - Equivalent Of Point And Size In C#?

Dec 7, 2011

I need to get the equivalent of Point and Size in C#.

When I tried to convert the code below from VB.NETto C#

New Size(Sw, Sh) I get this

new Size(Sw, Sh); Which gives an error The error am getting is The type or namespace name 'Size' could not be found (are you missing a using directive or an assembly reference?)EDIT 2I have been using vb in vs2008, which does not promt me to import system.drawing, perhaps it was doing it in the background so i didn't expect to do it in c# in vs2008

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Add A Decimal Point In Front Of A Value?

Mar 12, 2010

I have a value that shows a integer value between 0-100. For a little math, I need to be able to add a decimal in front of the value. So if the value was 50%, I need it really to be .50%.

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Add Up Total Point Using Checkboxes?

May 17, 2009

I would like to know how do I add points to the checkboxes and how do I add the checked boxes up to get the overall points?

Below I have an attachment on roughly how I wan it to works in case my words are not that clear.

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