Forms :: Trying To Develop A Simple Calculator
Jun 16, 2011I am new in programming, I am trying to develop a simple calculator but I am unable to connect the addition, subtraction and equal sign buttons.[code]
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Develop A Simple Math Calculator That Will Allow The User To Input The Right-hand-side (RHS) Of An Equation Into A Textbox?
Dec 12, 2011I am trying to develop a simple math calculator that will allow the user to input the right-hand-side (RHS) of an equation into a textbox on the application and have the application evaluate the expression for a given value of x, which is also input
into the application by the user via another textbox.For example, if the user wants to evaluate the following expression,
y = 3 + 4*x + 5*x^2
then they would input into the textbox the RHS of the equation
3 + 4*x + 5*x^2
and then enter a value of x into the another textbox and click on the calculate button.I tried this:
answer = EquationTextBox.Text
but it doesn't work.
Develop A Calculator That Will Determine Prices For Candy In VISUAL BASIC 2010?
Sep 29, 2010Sweet candy store currently has a special offering of heart shaped candy. It comes in two sizes: small and large. The company sells the large one for $29.50 and the small for $16.25.Design an application to calculate how much a costumer owes. When the user clicks the "Calculate" button, the program gets the number of large and small chocolate hearts ordered from the textboxes, calculates and displays the extended price for each type of the chocolate in a label. The program also calculates the weight of the chocolate to determine the shipping cost, displays the total weight, the shipping cost and the final total due. The large chocolate weighs 4 pounds 10 ounces, and the small one weighs 2 pounds 14 ounces. Shipping cost is 35 cents per pound and 3 cents for each additional ounce. Display all dollar amounts except the final total due with 2 decimal places. Display the FINAL TOTAL DUE with a leading dollar sign and 2 decimal places. Be sure to also include a CLEAR button that will remove all inputs/outputs from the form, and an EXIT button. Define the CALCULATE button as the accept button and the EXIT button as the cancel button.
View 4 RepliesDevelop A Simple Inventory System?
Mar 13, 2009I am trying to develop a simple inventory system. I now have all the database set up and would like to know if there is any code that I can refer to that alert users when the stock is low (e.g pop out window informing users that stock is low or change the number of stock in the database table into different colors).
View 16 RepliesDevelop A Simple Program To Sendkeys To Another?
Feb 15, 2011I'm trying to develop a simple program which will show a form with a listbox and a button. The buttom will allow a listbox entry to be selected and close the form. The entry will them be sent to the previous open application.
For example, I could select my postcode from the listbox and have it sent to the currently selected field in my internet browser. Or the current date to my text editor.[code]...
Add Tax On A Simple Calculator?
Oct 11, 2009I am doing a tutorial for a simple calculator. My question is how can I add code to make a botton that add my tax % to the total amount I have.
Option Explicit On
Public Class Form1
Dim firstnumber As Single
[Code]......
Build A Simple Calculator In VB?
Mar 20, 2006how to build a simple calculator in VB; i got the interface with buttons and text box alredy and i figured out how to put more then one number using buttons alredy(Disp.Text = Disp.Text & 1) , Looking at the windows calc, how do you store the number u just entered into a text box and alowe user to enter another to performe calculations, what code should i use for equal button and etc.
View 10 RepliesCode For Simple Calculator?
Jul 12, 2009code for calculator using vb.net
View 2 RepliesMaking A Simple Calculator In VB?
Oct 1, 2005how to make a simple calculator using vb?
View 11 RepliesCreate A Simple Calculator Using Only 1 Textbox?
Mar 29, 2011I want to create a simple calculator using only 1 textbox , 1 button and 1 label, but I don't know how to create the code.
for example if i write : 53+35-33=
and if i press the button it will calculate and the answer the label will show the answer (55).
Creating A Simple Function Calculator?
Dec 8, 2010i am going creating a simple function calculator, but I had to first do a design documentation proposal. I now have to update the project proposal with a storyboard or list of menu and screen items to delineate my proposed user screen and menus.aside from the calculator itself there will not be any menus.I also have to list any user data inputs and outputs my application will require and produce, which i assume i can put any numbers that the user inputs into the calculator and their results.
View 5 RepliesMultiple Operations With A Simple Calculator?
Jul 31, 2011I've got the bulk of a calculator up and working, however it doesn't like multiple operations. For example 3x5+2= brings up 10 (i.e. 3+5+2) and even doing it in two parts doesn't help, if I enter 3x5= I get 15 then +2= gives me 32 (i.e. 3x5=15 15x2=30 30+2=32). Also I am getting trialing zeros in my command line I can't debug.Note that lblcommandline displays the whole function and lbldisplay just displays the current imputted number.
Public Class frmSimpleCalc
'This code is run when the program starts. Here we 'declare' or basically, define which variables we want, what they are and such.
'So, for this example, we need two variables. The number we are CALCULATING and the one which we will CALCULATE FROM.
Dim lCalcNumberMaster As Long 'The master number is the solution, the number stored and displayed when we click equals.
[code]....
Simple Calculator - How To Work With Print
Jun 11, 2011I am making a calculator Program to start off on visual basic. I got it to work with MsgBox, but now I'm trying to get it to work with the Print.
MsgBox Example
Public Class Form1
Private Sub Button1_MouseClick(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Button1.MouseClick
Dim Pizza As Integer
[Code] .....
Say I type in 6 and 6 I'm getting errors saying Example: Conversion from string "youranswer is 12" to type 'Integer' is not valid. I've tried many things, but it's not working. I want to know what I need to do to get it to print out how I want it. Do I need to do some conversions properly somehow?
Simple Calculator Multiplication And Division?
Jan 30, 2010Simple Calculator multiplication and division Trying to make a simple calculator. My program inputs numbers and arithmetic operations thru commandbuttons. The numbers, num(n-+1), are odd and the operations, op(n), are even. The code is based on the even op string. Every time a op occurs it is stored in numop(n) to be accessed later. I have all the other operations in sequential order: "*"," "/, "+" and "-". The other similar For-Next loop are the same just interchange the two * for /, +and -. The "+" and "-" work fine in this configuration.
My problem is the multiplication and division does not occur. The numbers and operations line up. The numop(m)=g*h should yield numop(m)=num(1)*num(3). Is there some sort of code to be inserted to accomplish these multiplication and division operations?
[Code]...
Develop A Simple VB Application To Control A Data Projector Using RS232?
Feb 1, 2011I am using Visual Basic.net 2010 to try to develop a simple VB application to control a data projector using RS232.So far, I have programmed the 'power on' button to open the serial port and send the power on command.The port opens successfully, but the projector does not receive the command properly, so it never powers on the projector.The RS232 command for power on is: BE EF 03 06 00 BA D2 01 00 00 60 01 00
My code for sending the command is: Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code]...
Make A Simple Resistance Calculator For Practice?
Nov 21, 2009I am trying to make a simple resistance calculator for practice. I use text boxes to let the user input the current and voltage, and then a combo box for the units and then a list box to display the results. For some reason no matter which units I select it doesn't convert at all. For example 1/2 will always show up as 0.5 in the list box no matter which units are selected from the combo box. Here is my code.....I know that there is more cases but I only put one to see if it works before I write all of the cases.
Public Class Form1
Dim unitsA As String
Dim unitsV As String
[code]....
Forms :: Develop A Screen Resolution Independent Application?
Jul 7, 2009How to develop a screen resolution independent vb.net application.
View 1 RepliesForms :: Average Pace Calculator
Mar 25, 2010I'm trying to generate a simple average pace calculator. I have coded the calculator to a stage where it seems to work although on testing it i have noted my average pace rounding seems to vary slightly from others online. Although i have also note different calculators online seem to vary from each other.
I have used the .tostring("0.##") as a means of converting my calculation back to actual time rather than a decimal. Is this the correct method or is there a better way?
[code...]
Forms :: Basic Calculator In VB 2008?
Dec 14, 2009I am new to visual basic 2008, and i started with simple project-calculator. I made it to the point where "+" sign works, and "=" sign execute the command of "+" sign.Now i try to make "-" sign work: the problem is, idk how to bind it with "=". Here is the
Public Class Form1
Dim total1 As Integer
Dim total2 As Integer
[code].....
Button To Link To Next Forms In An Estimate Calculator?
Mar 23, 2010I am tring to make a price check calculator and in order for me to do that i need my users to choose their price level.
Right now i have a small web form created and its quite simple but i need my button for onclick to do link to corresponding forms that it goes to...Right now i have it as:
Public
Partial Class WebForm1
Inherits System.Web.UI.Page
[Code].....
Forms :: Move A Picture Box According To A Result (Calculator)?
Oct 28, 2011Ive made a calculator that estimates how high a model rocket will go. I was intending on making a simulation that will show you visually how high it will go. (Little rocket image goes up and stops at estimated hight) I know how to make a picture box move and everything, but i can only make it move to a set distance.
View 3 RepliesCreate A Simple Application Which Has 2 Forms?
Apr 20, 2010I wanted to create a simple application which has 2 forms.the first one contains a combobox which has the list of names of reports.now i select this report and click on next which takes me to the 2nd form.there i have to enter 4 values(or parameters)like the date from and date to and other 2 values...using these 5 values i want to retrieve the respective reports from the archive folder based on these parameters...i just know how to select and move to the second form from the first..how do i achieve my goal of retrieving the pdf files.i want the result in a table form which will have column names of the parameters i pass and the last column with the report pdfs.
View 6 RepliesCoding Simple Database Or Forms Program?
May 14, 2009Recently, someone asked me to code a program for them in Visual Stuido. What they need is a program that allows them to enter names, and each name has to pick a option (i was thinking that the user would select a radio button) and each option could only be selected a limited number of times.
View 8 RepliesSimple Forms With Rich Text Output?
Apr 6, 2010I have absolutely zero coding experience and my background is non-IT. I'm however trying toy friend who also shares the same non-coding skillset as mine her automate some of her work but building a simple form that takes a bunch of input (drop down, check boxes, radio buttons, rich text boxes etc) and outputs it to the a word or rtf file. Is this possible?
View 14 RepliesDB/Reporting - Simple DB Steps - Building Two Forms With One To Many Relation
Aug 4, 2009With a 1-many relation. Ok, I have constructed the schema, and now I want to make the appropriate forms in which a user would scroll for a customer and then by pressing a button, a new form would appear showing all the orders that he has made.
I am interested in the way of building two forms that would have a one to many relation. That is basically what I would like to know. Also, Do you have any good book to suggest in order to create a real world app, in VB2008, Emphasizing in data-binding and connecting controls with underlying DB, one to many forms, searching etc.
Forms :: Unable To Create A Simple Text Editor?
Jun 25, 2009I'm new to VB.NET, and have set myself a little challege to learn VB.NET, I was wondering if you you guys new any really good tutorials on how to create a effective MDI Text Editor?, Ive been able to create a simple text editor, however the next step is to use the MDI to be able to have mulitple windows within one form
View 5 RepliesForms :: Cross-thread Operation - Setting Up A Simple Application That Has 2 Variables?
Nov 18, 2011I'm setting up a simple app that has 2 variables, one from a combobox and one from a textbox.Putting all my code directly in the button1_click sub works just fine, however, I wanted to add a marquee progress bar so I tried to implement a backgroundworker.
[code]...
and call it with Me.Invoke(New SetComboBoxTextDelegate(AddressOf SetComboBoxText), ComboBox1.Text)but it still throws the Cross-thread operation invalid error.
Post A Simple Code Using VB That Start Building Simple Games?
Jun 10, 2011Is there anyone can post a simple code using vb,that start building a simple games ?
View 2 RepliesForms :: Process MainWindowHandle - Simple GUI Form To Hide / Show / Minimize / Terminate / Force Terminate
Sep 11, 2011I have a simple GUI form to hide / show / minimize / terminate / force terminate Processes. i can do all well but for show and hide i need the MainWindowHandle to show or hide it
So here is hide process code:
Dim Proc As New Process = Process.GetProcessesById(List.SelectedRows(0).Cells(1))
Dim hwnd = Proc.MainWindowHandle
ShowWindow(hwnd,0)
If i try the same with show code:
Dim Proc As New Process = Process.GetProcessesById(List.SelectedRows(0).Cells(1))
Dim hwnd = Proc.MainWindowHandle
ShowWindow(hwnd,9)
The MainWindowHandle become 0 cuz its hidden is there is any other way to get the MainWindowHandle of Process ?
Make A Simple Browser With Some Simple Addon's?
Dec 9, 2011Trying to make a simple browser with some simple addon's. What Ive done is setup a menu(forum) for the user to enter their email providers web address and it will save it in a xml file. When they click on the email link, it should load the email xml iformation and place that info in the tb_html.text and navigate. I keep getting a null exception and im not sure what going on here. Here is the code:
Browsers:
Private Sub btn_Email_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_Email.Click
'Load Action
Dim SavedEmailObj As Storage
[code].....