For this you will need 19 buttons and one text box (txtNUMBER). Have a look at the picture that is at the bottom on how I have made mine.
first we will declare the variables:
'Declare the global variables to be used throughout the form Dim mfirst As Single Dim msecond As Single Dim manswer As Single ' Declare the global variables for the operators: Add,Sub,Mul and DIV Dim mbutton As Integer 'Change the sign of the number from + or - or vice versa ' Depending on its state now they show in txtNUMBER text box Dim Signstate As Boolean
Second we will make it so that the number buttons actually do something so add the code into the your form:
Private Sub cmd0_Click() 'Put the value 0 into the txtNUMBER text box txtNUMBER = txtNUMBER + "0" End Sub Private Sub cmd1_Click() 'Put the value 1 into the txtNUMBER text box txtNUMBER = txtNUMBER + "1" End Sub Private Sub cmd2_Click() 'Put the value 2 into the txtNUMBER text box txtNUMBER = txtNUMBER + "2" End Sub Private Sub cmd3_Click() 'Put the value 3 into the txtNUMBER text box txtNUMBER = txtNUMBER + "3" End Sub Private Sub cmd4_Click() 'Put the value 4 into the txtNUMBER text box txtNUMBER = txtNUMBER + "4" End Sub Private Sub cmd5_Click() 'Put the value 5 into the txtNUMBER text box txtNUMBER = txtNUMBER + "5" End Sub Private Sub cmd6_Click() 'Put the value 6 into the txtNUMBER text box txtNUMBER = txtNUMBER + "6" End Sub Private Sub cmd7_Click() 'Put the value 7 into the txtNUMBER text box txtNUMBER = txtNUMBER + "7" End Sub Private Sub cmd8_Click() 'Put the value 8 into the txtNUMBER text box txtNUMBER = txtNUMBER + "8" End Sub Private Sub cmd9_Click() 'Put the value 9 into the txtNUMBER text box txtNUMBER = txtNUMBER + "9" End Sub
Noticing that all the number buttons are called cmd# (# is the number) as your buttons need to have these names.
Now we will make the math buttons. The first is the add button:
Private Sub cmdADD_Click() 'User slected the add button mbutton = 1 'Convert into a number and transfer the value from 'The text box on the form into the first number mfirst = Val(txtNUMBER) txtNUMBER = "" End Sub
Subtract:
Private Sub cmdSUBTRACT_Click() 'User slected the minus button mbutton = 2 'Convert into a number and transfer the value from 'The text box on the form into the first number mfirst = Val(txtNUMBER) txtNUMBER = "" End Sub
Multiply:
Private Sub cmdMULTIPLY_Click() 'User slected the multiply button mbutton = 3 'Convert into a number and transfer the value from 'The text box on the form into the first number mfirst = Val(txtNUMBER) txtNUMBER = "" End Sub
Divide:
Private Sub cmdDIVIDE_Click() 'User slected the Divide button mbutton = 4 'Convert into a number and transfer the value from 'The text box on the form into the first number mfirst = Val(txtNUMBER) txtNUMBER = "" End Sub
Now we will make the equals button work otherwise theres no point to all this.
Private Sub cmdEQUALS_Click() msecond = Val(txtNUMBER) Select Case mbutton Case Is = 1 manswer = mfirst + msecond Case Is = 2 manswer = mfirst - msecond Case Is = 3 manswer = mfirst * msecond Case Is = 4 manswer = mfirst / msecond End Select txtNUMBER = manswer End Sub
Now you can test your calculator to see it work. Once you have test we have just a few more bits to add such as the decimal point:
Private Sub cmdDOT_Click() txtNUMBER = txtNUMBER + "." End Sub
The next bit of code is to change the sign state:
Private Sub cmdSIGN_Click()
'Sign state = false on load of form
If txtNUMBER = "-" + txtNUMBER Then
MsgBox "error start again"
End If
If Signstate = False Then
txtNUMBER = "-" + txtNUMBER
Signstate = True
Else
'SignState = True
minusvalue = Val(txtNUMBER)
'Value now positive
minusvalue = Val("-1" * minusvalue)
txtNUMBER = minusvalue
Signstate = False
End If
End Sub
The next two bits are to cancel meaning empty the textbox and to end the program.
Private Sub cmdEXIT_Click() Unload frmCALCULATOR End Sub Private Sub cmdCANCEL_Click() 'Remove the values in the txtNUMBER text box txtNUMBER = " " End Sub
Now your calculator is complete all you have to do is test it. Since this has a lot of code I have added a text file with the code in it. If you do have any problems then just comment me and I will do what I can to help.
Attached File(s)
-
code.txt (3.27K)
Number of downloads: 35496





MultiQuote




|