I'm having 3 digit hexadecimal value, example "ccc" How can I use this value for setpixel function.
out.SetPixel(j, k, Color.FromArgb(255, Val("&H" & "ccc"), Val("&H" & "ccc"), Val("&H" & "ccc")))
It gives error, How can I use 3 digit Hex value.
I would like to covert a 4 digit hexadecimal code point to UTF8.
For example:
4e00 to 一
Dim s1 As String = Char.ConvertFromUtf32(&H28E02)
I don't think they are built for my 4 digit code though.
I just finished this application where you enter a five-digit credit card number, with the fifth digit being the check digit. everything seems to work except, I can't seem to get it to determine that any number is "valid". Every 5-digit combination that I enter returns "The credit card number is not valid". Im using visual basic 2008 express
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I have a Form with 4 Text Boxes, 1 label and one button. What I need to do is: Make all the text boxes and label only except Hexadecimal inputs.when I press Button1
Label1 = TextBox1 AND TextBox2 ^ TextBox3 MOD TextBox4
Once again every all the numbers are in Hexadecimal format.
I'm supposed to write a program that validates an inputted ten digit ISBN number using the check-digit at the end to ensure that the sum is a multiple of eleven. Before calculating this and detecting if the entered number is indeed a valid ISBN, we're required to check the first nine digits and see if they are indeed integers. After this the tenth digit is checked to see if it is "X" (for ten) or 0-9.
With the code I've written it keeps returning false for whether or not the ISBN is valid, even with valid numbers. I feel like its something to do with the hyphens; have I misused the replace function?I'm a little lost on how to make my code work, but I'm fairly certain my logic is okay so far.
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I'm making a project that randomly picks a number from an array, but if it picks a number less than 10 then the number is a single instead of a double.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim N(2) As Integer
N(0) = "0" & 1
N(1) = "0" & 2
N(2) = "0" & 3
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Ok, I have like this:
Public basic_numbers(10) As Integer
basic_numbers(0) = 0
basic_numbers(1) = 1
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i want a button to perform a function of checking the last digit number in a field of a table in and add a digit to it and display it in a textbox.
View 1 RepliesI'm using Visual Studio and table adapters using an Access DB as the backend. I need the minimum 4 digit value. I want to get next available 4 or 5 digit number. And this will change depending upon the users request. Currently I use a table adabpter query. But how would I write a query. I suppose I could do a long iterative loop through all values until I see a 4 digit.But I'm trying to think of something more efficient.
Function GetNextAvailableNumber(NumofDigits) as Long
'SQL Code Here ----
'Query Number Table
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I have a icon maker program. I have two pictureboxes pic1 and pic2 and a open image button. I need a code that will if the pic1.image color has any red in it, it will take that red and turn it into the desired color. I know you can use getpixel and setpixel but I don't know how to use these.
View 13 RepliesI worked in a role and functioning properly. The problem is that it is a bit slow for use in many images would be very slow. I read online that with stride and scan0 and working in memory with buffer can be made faster, but i don´t understand anything . Does anyone know how it works or how to make my code run faster?
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I have been using Bitmap.SetPixel & copying the entire bitmap to a picture box after the entire graphic has been drawn. When running debug within the IDE, this takes less than 10 seconds, while DrawEllipse or Rectangle takes almost 4 minutes.I will be using the more time consuming method for my next application, since that application requires seeing points set in Picture Box as they are generated
View 2 Repliesits the first time im trying to use SetPixel , it doesn't seem to work at all,
im trying to draw anywhere in the screen (where the mouse is), there must be something im doing wrong
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I am trying to use GetPixel and SetPixel to copy the contents of one picture to another (I know there are other methods to do so, but there are reasons I want to try this ;D)Anyway, the pictures are .png images, so they include transparency settings.
But for some reason, it seems like when I use GetPixel & SetPixel to put one image over another, it seems the second image completely replaces the other one. I mean, it seems the transparency settings are not respected when I use GetPixel & SetPixel.Both images have the same size. Both have transparent areas.
Here's my
Public Class Form1
Dim imgImage As Bitmap
Dim clrOld As Color
Dim clrNew As Color
Dim blnChange
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I receive these error:
"SetPixel is not supported for images with indexed pixel formats."
I am loading an image on picturebox, then trying to paint some particular pixel but it does not work for the tif image that I have. I got the following error message "SetPixel is not supported for images with indexed pixel formats."
View 5 Repliesim using vb 2010 and currently working on a program that senses and displays values in hexadecimal, i have already done this part, but now im required to convert the value that is in the textbox, for example 006d to 109.
View 12 RepliesI have 4 radiobuttons hex dec oct bin all the buttons works perfectly except the Hex.When i calculate or press a number in decimal, and i check the Hex, the number will perfectly change into hexadecimal, but when i try to calculate within Hex, its a calculation in Decimal.So i repeat.. i can calculate in base 8 octal, base 2 decimal, and base 10 decimal, but i cant calculate in base 16... and i think it has something to do with the letter notation...
View 4 Replieshow i can convert from Hexadecimal to Ascii ? like this ez : a hex text "6d 65 68 64 69 33" will became a ascii "mehdi3"
View 2 RepliesI'm just wondering how to convert a string from a textbox into hexadecimal. I looked all over the internet and only found ways in c#. Does vb.net have the ability to do such a thing? If it can then I'd like to know how to convert string to hex and hex to string.
View 4 RepliesI'm writing a small program that will convert a negative number (e.g. -200) to a hexadecimal number (e.g. FF38). And back to a decimal number. FF38 back to -200. (I can only use two bytes when converting back and forth.)
Question: is there a function in VB that will help?
I have question about hexadecimal operator and the question what does this mean:(Hexadecimal, Hexadecimal, Hexadecimal, Hexadecimal) = Hexadecimal What does the , mean and how can I put this operator in VB form .
View 4 RepliesI am trying to display the register contents in a textbox in hexadecimal. I would like to always display 4 characters. The register is 16 bits wide. I have 4 byte parameter variables (param_a_1 through param_a_4) for containing the incoming register value. Because of the way the packet is communicated into the VB app, I pick out the bytes I want displayed and convert them to a string for displaying. The values I get in are not always converted correctly
View 1 RepliesSearching this forum and google turn up things which seem too complicated(more then 4 lines of code), but maybe it needs to be that way.I have two text boxes. A 1 byte hexidecimal value would be entered in to each of them (0-FF). How can I add those two values together to come up with an integer?I have tried this several ways. At one point I got it to work but only for numeric characters.
View 2 RepliesI am currently working on a software that will convert a string to it's hexadecimal equivalent and back. I have created the following code to make the convert the string to hexadecimal, but I cannot figure out how to get it back.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim skill As String
skill = RichTextBox1.Text
Dim skillfullbyte() As Byte
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I currently doing a project..Using VB2005 To convert hexadecimal to decimal. Something to do with serial port..
View 14 RepliesI need to figure out how to multiply hexadecimal numbers in vb .net 2008.Ex / 7E1 x 2 == FC2I was thinking maybe converting the hex to bytes, multiplying that, then back.
View 13 RepliesWhat's the trailing ampersand on VB hexadecimal numbers for? I've read it forces conversion to an Int32 on the chance VB wants to try and store as an Int16. That makes sense to me. But the part I didn't get from the blurb was to always use the trailing ampersand for bitmasks, flags, enums, etc. Apparantly, it has something to do with overriding VB's fetish for using signed numbers for things internally, which can lead to weird results in comparisons.
So to get easy points, what are the rules for VB.Net hexadecimal numbers, with and without the trailing ampersand? Please include the specific usage in the case of bitmasks/flags and such, and how one would also use it to force signed vs. unsigned.
I have the following code:
Private Function ReadRequestedSecurityToken(ByVal rstr As XDocument) As RequestedSecurityToken
Dim requestedToken = (
From rt In rstr.Descendants(WSTrust13Constants.NamespaceURI.ToString &
WSTrust13Constants.ElementNames.RequestedSecurityToken)
Select rt).FirstOrDefault()
If Nothing Is requestedToken Then
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Possible Duplicate: How to convert numbers between hexadecimal and decimal in C#? In C, you can do something like int x = 255; printf("x is: %d and in HEX, x is: %x", x, x); How can I do that in C# or VB.net? print the variable's hex equivalent
View 7 Replies
