Name:-programming in visual basic
Question (1):- WAP to perform arithmetic operation uses command
buttons. (Declare variables globally).
Answer:-Form Layout
Coding For The Program
Dim n1 As IntegerDim n2 As IntegerDim r As Integer
Private Sub Command1_Click()n1 = Val(Text1.Text)n2 =
Val(Text2.Text)r = n1 + n2Text3.Text = rEnd Sub
Private Sub Command2_Click()n1 = Val(Text1.Text)n2 =
Val(Text2.Text)r = n1 - n2Text3.Text = rEnd Sub
Private Sub Command3_Click()n1 = Val(Text1.Text)n2 =
Val(Text2.Text)r = n1 * n2Text3.Text = rEnd Sub
Private Sub Command4_Click()n1 = Val(Text1.Text)n2 =
Val(Text2.Text)r = n1 / n2Text3.Text = rEnd Sub
Private Sub Command5_Click()Text1.Text = ""Text2.Text =
""Text3.Text = ""End Sub
Output:-
Question (2):-WAP to take input of principal, rate & time
and calculate simple interest & compound interest.
Answer:-Form Layout
Coding For The Program
Dim p As IntegerDim r As IntegerDim t As IntegerDim si As
IntegerDim ci As Integer
Private Sub Command1_Click()
p = Val(Text1)r = Val(Text2)t = Val(Text3)si = (p * r * t) /
100Text4 = sici = (p * (1 + r / 100) ^ t) - pText5 = ciEnd Sub
Private Sub Command2_Click()Text1 = ""Text2 = ""Text3 = ""Text4
= ""Text5 = ""End Sub
Output:-
Question (3):- Write a program to take input of x and print
table of x in the following format.
X * 1 = X X * 2 = 2X ----------- ----------- X * 10 = 10*X
Answer:- Form Layout
Coding section:-Dim x As IntegerPrivate Sub
Command1_Click()Form1.Clsx = InputBox("Enter The Value of X ")For i
= 1 To 10 Step 1Print x; "*"; i; "="; i * xNext iEnd Sub
Private Sub Command2_Click()EndEnd Sub
Output:-
Question (4):- Design an interface, which will appear like mark
sheet. It will take input of marks in five subjects and calculate
total marks and percentage then provide grade according to
following criteria. (Using nested if) ( Use tab index property to
move focus ).If % Then Grade> = 90A+> = 75 & < 90
A> = 60 & < 75B> = 45 & < 60COtherwise
FAnswer:- Form Layout
Coding For The Program
Dim a#, b#, c#, d#, e#, total#, per#
Private Sub Command1_Click()a = Val(Text3.Text)b =
Val(Text4.Text)c = Val(Text5.Text)d = Val(Text6.Text)e =
Val(Text7.Text)total = (a + b + c + d + e)Text8.Text = totalper =
total / 5Text9.Text = per & "%"
Select Case perCase 90 To 100 Label11.Caption = "A+"Case 75 To
89Label11.Caption = "A"Case 60 To 74Label11.Caption = "B"Case 45 To
59Label11.Caption = "C"Case ElseLabel11.Caption = "F"End SelectEnd
Sub
Private Sub Command2_Click()Text1.Text = ""Text2.Text =
""Text3.Text = ""Text4.Text = ""Text5.Text = ""Text6.Text =
""Text7.Text = ""Text8.Text = ""Text9.Text = ""Label11.Caption =
""
End Sub
Output:-
Question (5):- WAP to illustrate all functionalities of list box
and combo box.Answer:-Form Layout
Coding For The Program
Private Sub cmdadditem1_Click()Combo1.AddItem (Combo1)End
Sub
Private Sub cmdadditem2_Click()List1.AddItem (Text1.Text)Text1 =
""End Sub
Private Sub cmdclearcombo_Click()Combo1.ClearEnd Sub
Private Sub cmdclearlist_Click()List1.ClearEnd Sub
Private Sub cmdexit_Click()EndEnd Sub
Private Sub cmdremoveitem2_Click()On Error Resume
NextList1.RemoveItem List1.ListIndexEnd Sub
Private Sub cmdrermoveitem1_Click()On Error Resume
NextCombo1.RemoveItem Combo1.ListIndexEnd Sub
Private Sub Command1_Click()Combo1.ClearEnd Sub
Output:-
Question (6):- WAP using check boxes for following font
effects.BoldItalicUnderline Increase font sizeDecrease font
sizeFont color
Answer:- Form Layout
Coding For The Program
Private Sub Check1_Click()If Check1.Value = vbChecked
ThenText1.FontBold = TrueElseText1.FontBold = FalseEnd IfEnd
Sub
Private Sub Check2_Click()If Check2.Value = vbChecked
ThenText1.FontItalic = TrueElseText1.FontItalic = FalseEnd IfEnd
Sub
Private Sub Check3_Click()If Check3.Value = vbChecked
ThenText1.FontUnderline = TrueElseText1.FontUnderline = FalseEnd
IfEnd SubPrivate Sub Check4_Click()If Check4.Value = 1
ThenCheck5.Value = 0Check6.Value = 0Text1.FontSize =
8ElseText1.FontSize = 8End IfEnd Sub
Private Sub Check5_Click()If Check5.Value = 1 ThenCheck4.Value =
0Check6.Value = 0Text1.FontSize = 12ElseText1.FontSize = 8End IfEnd
Sub
Private Sub Check6_Click()If Check6.Value = 1 ThenCheck4.Value =
0Check5.Value = 0Text1.FontSize = 14ElseText1.FontSize = 8End IfEnd
Sub
Private Sub Check7_Click()If Check7.Value = 1 ThenCheck8.Value =
0Check9.Value = 0Text1.ForeColor = vbRedElseIf Check7.Value = 0 And
Check8.Value = 0 And Check9.Value = 0 ThenEnd IfEnd Sub
Private Sub Check8_Click()If Check8.Value = 1 ThenCheck7.Value =
0Check9.Value = 0Text1.ForeColor = vbBlueElseIf Check7.Value = 0
And Check8.Value = 0 And Check9.Value = 0 ThenText1.ForeColor =
vbResCursorEnd IfEnd Sub
Private Sub Check9_Click()If Check9.Value = 1 ThenCheck8.Value =
0Check7.Value = 0Text1.ForeColor = vbGreenElseIf Check7.Value = 0
And Check8.Value = 0 And Check9.Value = 0 ThenText1.ForeColor =
vbResCursorEnd IfEnd Sub
Output:-
Question (7):- WAP to change back color of any control (label,
textbox) using scroll box.Answer:-Form Layout
Coding section:-Private Sub HScroll1_Change()Text1.BackColor =
RGB(HScroll1.Value, HScroll2.Value, HScroll3.Value)End Sub
Private Sub HScroll2_Change()Text1.BackColor =
RGB(HScroll1.Value, HScroll2.Value, HScroll3.Value)End Sub
Private Sub HScroll3_Change()Text1.BackColor =
RGB(HScroll1.Value, HScroll2.Value, HScroll3.Value)End
SubOutput:-
Question (8):- WAP to search an element for a one dimension
static array.
Answer:-Form Layout
Coding section:-
Dim a(5) As IntegerDim num As IntegerDim f As Integer
Private Sub Command1_Click()num = Input Box("enter number to be
searched")For i = 1 To 5 Step 1If num = a(i) Thenpos = if = 1End
IfNextIf f = 0 ThenPrint "element" & num; "not found"ElsePrint
"element found at" & pos; , "position"End IfEnd Sub
Private Sub Command2_Click()i = 0For i = 1 To 5 Step 1a(i) =
Input Box("enter array elements")Print "element =" &
a(i)PrintNext iEnd Sub
Output:-
Question (9):- WAP to illustrate call by value and call by
reference ( to swap to values).
Answer:-Form Layout
Coding section:-Dim x As IntegerDim y As Integer
Private Sub swapv(ByVal a As Integer, ByVal b As Integer)t = aa
= bb = tText3.Text = aText4.Text = bEnd Sub
Private Sub swapr(ByRef a As Integer, ByRef b As Integer)t = aa
= bb = tText3.Text = aText4.Text = bEnd Sub
Private Sub Command1_Click()x = Val(Text1.Text)y =
Val(Text2.Text)Call swapv(x, y)Print xPrint y
End Sub
Private Sub Command2_Click()x = Val(Text1.Text)y =
Val(Text2.Text)Call swapr(x, y)Print xPrint yEnd Sub
Output:-
Question (10):- Write a program to calculate factorial of a
number using user defined function.Answer:-Form Layout
Coding section
Dim n As IntegerDim d As IntegerPrivate Sub Command1_Click()n =
InputBox("enter no.", "processing", "0")d = fact(n)Text1.Text =
dEnd Sub
Public Function fact(num As Integer) As IntegerIf num
