Method To Create Digital Calculator

Method to Create Digital Calculator Object : Form Caption = Name =

"CALCULATOR" “frmCalc”

Object :CommandButton Name = cmdNeg Caption = "+/-" Object :CommandButton Name = cmdEqual Caption = "=" Object :CommandButton Name = cmdInvert Caption = "1/X" Object :CommandButton Name = cmdExp Caption = "^" Object :CommandButton Name = cmdDiv Caption = "/" Object :CommandButton Name = cmdMul

Caption

= "*"

Object :CommandButton Name = cmdMinus Caption = "-" Object :CommandButton Name = cmdPlus Caption = "+" Object :CommandButton Name = cmdClear Caption = "C" Object :CommandButton Name = cmdDot Caption = "." Object :CommandButton Name = cmdDigit Caption = "0" Index = 9 Object :CommandButton Name = cmdDigit Caption = "1" Index = 8 Object :CommandButton Name = cmdDigit Caption = "2" Index = 7 Object :CommandButton Name = cmdDigit Caption = "3" Index = 6 Object :CommandButton Name = cmdDigit Caption = "4" Index = 5 Object :CommandButton Name = cmdDigit

Caption = "5" Index = 4 Object :CommandButton Name = cmdDigit Caption = "6" Index = 3 Object :CommandButton Name = cmdDigit Caption = "7" Height = 495 Index = 2 Object :CommandButton Name = cmdDigit Caption = "8" Index = 1 Object :CommandButton Name = cmdDigit Caption = "9" Index = 0 Object :CommandButton Name = lblDisplay Alignment = 1 'Right Justify BackColor = &H80000009& BorderStyle = 1 'Fixed Single Dim Op1 As Integer Dim Op2 As Integer Dim Oper As String Private Sub cmdClear_Click() lblDisplay.Caption = "" End Sub Private Sub cmdDigit_Click(Index As Integer) lblDisplay.Caption = lblDisplay.Caption & CmdDigit(Index).Caption End Sub Private Sub cmdDiv_Click() If lblDisplay.Caption <> "" Then Op1 = lblDisplay.Caption lblDisplay.Caption = ""

Oper = "/" End If End Sub Private Sub cmdEqual_Click() If lblDisplay.Caption <> "" Then Op2 = lblDisplay.Caption End If Select Case Oper Case "+" lblDisplay.Caption = Op1 + Op2 Case "-" lblDisplay.Caption = Op1 - Op2 Case "*" lblDisplay.Caption = Op1 * Op2 Case "/" If Op2 <> 0 Then lblDisplay.Caption = Op1 / Op2 Else lblDisplay.Caption = "E" End If Case "^" lblDisplay.Caption = Op1 ^ Op2 End Select End Sub Private Sub cmdExp_Click() If lblDisplay.Caption <> "" Then Op1 = lblDisplay.Caption lblDisplay.Caption = "" Oper = "^" End If End Sub Private Sub cmdInvert_Click() If lblDisplay.Caption <> "" And lblDisplay.Caption <> "0" Then lblDisplay.Caption = 1 / lblDisplay.Caption Else lblDisplay.Caption = "E" End If

End Sub Private Sub cmdMinus_Click() If lblDisplay.Caption <> "" Then Op1 = lblDisplay.Caption lblDisplay.Caption = "" Oper = "-" End If End Sub Private Sub cmdMod_Click() If lblDisplay.Caption <> "" Then Op1 = lblDisplay.Caption lblDisplay.Caption = "" Oper = "%" End If End Sub Private Sub cmdMul_Click() If lblDisplay.Caption <> "" Then Op1 = lblDisplay.Caption lblDisplay.Caption = "" Oper = "*" End If End Sub Private Sub cmdNeg_Click() If lblDisplay.Caption <> "" Then lblDisplay.Caption = -lblDisplay.Caption End If End Sub Private Sub cmdPlus_Click() If lblDisplay.Caption <> "" Then Op1 = lblDisplay.Caption lblDisplay.Caption = "" Oper = "+" End If End Sub Private Sub cmdDot_Click() If InStr(1, lblDisplay.Caption, ".") = 0 Then lblDisplay.Caption = lblDisplay.Caption + "." End If End Sub