1. Protector de pantalla
PUBLIC C AS Integer
PUBLIC CO AS Integer
PUBLIC CV AS Integer
PUBLIC SUB _new()
END
PUBLIC SUB Form_Open()
END
PUBLIC SUB Timer1_Timer()
C = Int(Rnd() * 500)
CO = Int(Rnd() * 500)
CV = Int(Rnd() * 20)
Draw.Begin(area1)
Draw.FillColor = Color.RGB((250 + C), (3 + CO), (C + CO))
Draw.FillStyle = Fill.Solid
Draw.Circle(C, CO, CV)
Draw.End
END
PUBLIC SUB Button1_Click()
IF Button1.Text = "Iniciar" THEN
Timer1.Enabled = TRUE
Button1.Caption = "Parar"
ELSE
Button1.Caption = "Iniciar"
Timer1.Enabled = FALSE
ENDIF
END
PUBLIC SUB Button2_Click()
END

2. Calculadora
PUBLIC BAN AS Integer
PUBLIC OP1 AS Single
PUBLIC OP2 AS Single
PUBLIC SUB _new()
END
PUBLIC SUB Form_Open()
END
PUBLIC SUB Button1_Click()
BAN = 1
IF TextBox1.Text <> 0 THEN
OP1 = TextBox1.Text
ELSE
OP1 = 0
ENDIF
TextBox1.Clear
END
PUBLIC SUB Button18_Click()
ME.Close
END
PUBLIC SUB Button8_Click()

3. TextBox1.Text = ""
END
PUBLIC SUB Button6_Click()
TextBox1.Text = TextBox1.Text & "0"
END
PUBLIC SUB Button7_Click()
TextBox1.Text = TextBox1.Text & "."
END
PUBLIC SUB Button9_Click()
TextBox1.Text = TextBox1.Text & "1"
END
PUBLIC SUB Button10_Click()
TextBox1.Text = TextBox1.Text & "2"
END
PUBLIC SUB Button11_Click()
TextBox1.Text = TextBox1.Text & "3"
END
PUBLIC SUB Button12_Click()
TextBox1.Text = TextBox1.Text & "4"
END
PUBLIC SUB Button13_Click()
TextBox1.Text = TextBox1.Text & "5"
END
PUBLIC SUB Button14_Click()
TextBox1.Text = TextBox1.Text & "6"

4. END
PUBLIC SUB Button15_Click()
TextBox1.Text = TextBox1.Text & "7"
END
PUBLIC SUB Button16_Click()
TextBox1.Text = TextBox1.Text & "8"
END
PUBLIC SUB Button17_Click()
TextBox1.Text = TextBox1.Text & "9"
END
PUBLIC SUB TextBox1_KeyPress()
END
PUBLIC SUB Button2_Click()
BAN = 2
IF TextBox1.Text <> 0 THEN
OP1 = TextBox1.Text
ELSE
OP1 = 0
ENDIF
TextBox1.Clear
END
PUBLIC SUB Button3_Click()
BAN = 3
IF TextBox1.Text <> 0 THEN
OP1 = TextBox1.Text
ELSE
OP1 = 0
ENDIF
TextBox1.Clear
END
PUBLIC SUB Button4_Click()

5. BAN = 4
IF TextBox1.Text <> 0 THEN
OP1 = TextBox1.Text
ELSE
OP1 = 0
ENDIF
TextBox1.Clear
END
PUBLIC SUB Button5_Click()
IF TextBox1.Text <> 0 THEN
OP2 = Val(TextBox1.Text)
ELSE
OP2 = 0
ENDIF
TextBox1.Text = operacion(OP1, OP2, BAN)
END
PUBLIC FUNCTION operacion(v1 AS Float, v2 AS Float, opera AS Integer) AS Float
DIM re AS Single
DIM y2, x, y, z, x1, z2, y1 AS Integer
DIM f, i AS Integer
SELECT CASE opera
CASE 1
re = v1 + v2
z2 = 1
CASE 2
re = v1 ­ v2
z2 = 1
CASE 3
re = v1 * v2
z2 = 1
CASE 4
re = v1 / v2
z2 = 1
CASE 5
re = (v1 * v2) / 100
z2 = 1
CASE 6
re = v1 * v1
z2 = 1
CASE 7
re = v1 * v1 * v1
z2 = 1
CASE 8
re = 1 / v1

6. z2 = 1
CASE 9
f = 1
FOR i = 1 TO v1
f = f * i
NEXT
re = f
z2 = 1
CASE 10
re = Rnd(v1)
z2 = 1
END SELECT
IF z2 = 1 THEN
RETURN re
ELSE
RETURN y1
ENDIF
END
PUBLIC SUB Button19_Click()
BAN = 5
IF TextBox1.Text <> 0 THEN
OP1 = TextBox1.Text
ELSE
OP1 = 0
ENDIF
TextBox1.Clear
END
PUBLIC SUB Button20_Click()
BAN = 6
IF TextBox1.Text <> 0 THEN
OP1 = TextBox1.Text
ELSE
OP1 = 0
ENDIF
TextBox1.Text = OP1
END
PUBLIC SUB Button21_Click()
'numero binario
DIM valor, x1, x2, i AS Integer
DIM cadena, cadena2 AS String
valor = TextBox1.Text

7.
WHILE valor > 0
x1 = valor MOD 2
x2 = Int(valor / 2)
cadena = cadena & Str(x1)
valor = x2
WEND
FOR i = Len(cadena) TO 1 STEP ­1
cadena2 = cadena2 & (Mid(cadena, i, 1))
NEXT
TextBox1.Text = cadena2
END
PUBLIC SUB Button22_Click()
'Calculo a octal de un número decimal
DIM valor, x1, x2, i AS Integer
DIM cadena, cadena2 AS String
' IF visor.Text <> 0 THEN
valor = TextBox1.Text
WHILE valor > 0
x1 = valor MOD 8
x2 = Int(valor / 8)
cadena = cadena & Str(x1)
valor = x2
WEND
FOR i = Len(cadena) TO 1 STEP ­1
cadena2 = cadena2 & (Mid(cadena, i, 1))
NEXT
TextBox1.Text = cadena2
END
PUBLIC SUB Button23_Click()
'Calculo a hexadecimal de un número decimal
DIM valor, x1, x2, i AS Integer
DIM cadena, cadena2 AS String
valor = TextBox1.Text
WHILE valor > 0
x1 = valor MOD 16
x2 = Int(valor / 16)
IF x1 = 10 THEN
cadena = cadena & "A"
ELSE
IF x1 = 11 THEN

8. cadena = cadena & "B"
ELSE
IF x1 = 12 THEN
cadena = cadena & "C"
ELSE
IF x1 = 13 THEN
cadena = cadena & "D"
ELSE
IF x1 = 14 THEN
cadena = cadena & "E"
ELSE
IF x1 = 15 THEN
cadena = cadena & "F"
ELSE
cadena = cadena & Str(x1)
ENDIF
ENDIF
ENDIF
ENDIF
ENDIF
ENDIF
valor = x2
WEND
FOR i = Len(cadena) TO 1 STEP ­1
cadena2 = cadena2 & (Mid(cadena, i, 1))
NEXT
TextBox1.Text = cadena2
END
PUBLIC SUB Button24_Click()
BAN = 7
IF TextBox1.Text <> 0 THEN
OP1 = TextBox1.Text
ELSE
OP1 = 0
ENDIF
TextBox1.Text = OP1
END
PUBLIC SUB Button25_Click()
BAN = 8
IF TextBox1.Text <> 0 THEN
OP1 = TextBox1.Text
ELSE
OP1 = 0

9. ENDIF
TextBox1.Text = OP1
END
PUBLIC SUB Button26_Click()
BAN = 9
IF TextBox1.Text <> 0 THEN
OP1 = TextBox1.Text
ELSE
OP1 = 0
ENDIF
TextBox1.Text = OP1
END
PUBLIC SUB Button27_Click()
DIM v1, v2, f, i, re AS Integer
f = v2
FOR i = 1 TO v2
f = f * v1
NEXT
re = f
END
PUBLIC SUB Button28_Click()
DIM s AS Float
s = Rad(TextBox1.Text)
TextBox1.Text = Sin(s)
END
PUBLIC SUB Button29_Click()
DIM c AS Float
c = Rad(TextBox1.Text)
TextBox1.Text = Cos(c)
END
PUBLIC SUB Button30_Click()
DIM t AS Float
t = Rad(TextBox1.Text)
TextBox1.Text = Tan(t)

10. END
PUBLIC SUB Button31_Click()
BAN = 10
IF TextBox1.Text <> 0 THEN
OP1 = TextBox1.Text
ELSE
OP1 = 0
ENDIF
TextBox1.Text = OP1
END
Cédula
PUBLIC SUB Main()
DIM b, c, d, e, f, g, h, i, x, z, xx AS Integer
DIM a AS String
PRINT "Ingrese el numero de cedula..."
INPUT a
FOR b = 1 TO 9 STEP 1
c = Str(Mid(a, b, 1))
d = b MOD 2
IF d = 0 THEN
i = i + c
ELSE
h = c * 2
IF h > 9 THEN
d = h MOD 10
e = Int(h / 10)
f = d + e
ELSE
f = h

11. ENDIF
g = g + f
ENDIF
NEXT
x = g + i
z = x MOD 10
xx = 10 ­ z
PRINT "El numero verificador es:...", xx
END
NOTA: Este ejercicio se ejecuta mediante la consola
Juego
PUBLIC SUB Button1_Click()
DIM n1 AS Integer
DIM n2 AS Integer
DIM n3 AS Integer
RANDOMIZE
n1 = Int(Rnd() * 10)
n2 = Int(Rnd() * 10)
n3 = Int(Rnd() * 10)
TextBox1.Text = n1
TextBox2.Text = n2
TextBox3.Text = n3
IF (n1 = n2) THEN
IF (n1 = n3) THEN
TextBox5.Text = TextBox4.Text * 2
Message("Ganastes el Doble", "Puedes cobrar")
TextBox1.Clear
TextBox2.Clear
TextBox3.Clear
TextBox4.Clear
TextBox5.Clear
ELSE
IF (n1 = 7) THEN

12. IF (n2 = 7) THEN
IF (n3 = 7) THEN
TextBox5.Text = TextBox4.Text * 4
Message("Ganastes el Premio Mayor", "Puedes cobrar")
TextBox1.Clear
TextBox2.Clear
TextBox3.Clear
TextBox4.Clear
TextBox5.Clear
ENDIF
ENDIF
ENDIF
ENDIF
ENDIF
END
PUBLIC SUB Button2_Click()
ME.Close
END
Factura
PUBLIC i AS Integer
PUBLIC r AS Integer
PUBLIC m AS Integer
PUBLIC SUB _new()
END
PUBLIC SUB Form_Open()
TextBox5.SetFocus

13. GridView1.Columns.Count = 5
GridView1.Rows.Count = 10
GridView1.Columns[0].Width = 50
GridView1.Columns[1].Width = 200
GridView1.Columns[2].Width = 80
GridView1.Columns[3].Width = 50
GridView1.Columns[4].Width = 80
GridView1[0, 0].Text = "NUM"
GridView1[0, 1].Text = "DETALLE"
GridView1[0, 2].Text = "PRECIO.U"
GridView1[0, 3].Text = "CANT"
GridView1[0, 4].Text = "TOTAL"
r = 0
i = 0
END
PUBLIC SUB Button2_Click()
TextBox1.Text = m
TextBox2.Text = (m * 7) / 100
TextBox3.Text = ((((TextBox1.Text) ­ (TextBox2.Text)) * 12) / 100)
TextBox4.Text = (TextBox1.Text) ­ (TextBox2.Text) + (TextBox3.Text)
END
PUBLIC SUB TextBox5_KeyPress()
IF Key.Code = 65293 THEN
IF TextBox5.Text = "" THEN
Message.Info("Ingrese Detalle")
TextBox5.SetFocus
ELSE
TextBox6.SetFocus
ENDIF
ENDIF
END
PUBLIC SUB TextBox7_KeyPress()
IF Key.Code = 65293 THEN
IF TextBox7.Text = "" THEN
Message.Info("Ingrese Valor")
TextBox7.SetFocus
ELSE
i = i + 1
r = r + 1
TextBox8.Text = i

14. GridView1[r, 0].Text = Val(TextBox8.Text)
GridView1[r, 1].Text = (TextBox5.Text)
GridView1[r, 2].Text = TextBox6.Text
GridView1[r, 3].Text = TextBox7.Text
TextBox9.Text = (TextBox6.Text) * (TextBox7.Text)
GridView1[r, 4].Text = Val(TextBox9.Text)
m = m + TextBox9.Text
TextBox5.Text = ""
TextBox6.Text = ""
TextBox7.Text = ""
TextBox5.SetFocus
ENDIF
ENDIF
END
PUBLIC SUB Button1_Click()
TextBox1.Text = ""
TextBox2.Text = ""
TextBox3.Text = ""
TextBox4.Text = ""
TextBox5.Text = ""
TextBox6.Text = ""
TextBox7.Text = ""
TextBox8.Text = ""
TextBox9.Text = ""
GridView1.Clear
END
PUBLIC SUB TextBox6_KeyPress()
IF Key.Code = 65293 THEN
IF TextBox6.Text = "" THEN
Message.Info("Ingrese Valor")
TextBox6.SetFocus
ELSE
TextBox7.SetFocus
ENDIF
ENDIF
END

15. Para realizar un gráfico
PUBLIC r AS Integer
PUBLIC posy AS Integer
PUBLIC posx AS Integer
PUBLIC al AS Integer
PUBLIC la AS Integer
PUBLIC SUB _new()
END
PUBLIC SUB Form_Open()
r = 20
al = 5
END
PUBLIC SUB Button1_Click()
posy = area1.Height / 2
posx = area1.Width / 2
Draw.Begin(area1)
Draw.FillColor = Color.RGB(100, 100, 50)
Draw.FillStyle = Fill.Solid
Draw.Circle(posx, posy, r)
r = r + 20
'Draw.Ellipse(200, 200, 100, 50)
Draw.End
END
PUBLIC SUB Button3_Click()
ME.Close
END
PUBLIC SUB Button2_Click()
area1.Clear
posy = area1.Height / 2
posx = area1.Width / 2

16. Draw.Begin(area1)
Draw.FillColor = Color.RGB(100, 100, 50)
Draw.FillStyle = Fill.Solid
Draw.Circle(posx, posy, r)
r = r ­ 20
'Draw.Ellipse(200, 200, 100, 50)
Draw.End
END
PUBLIC SUB Button4_Click()
area1.Clear
Draw.Begin(area1)
posy = area1.Height / 2
posx = area1.Width / 2
Draw.FillColor = Color.RGB(100, 100, 50)
Draw.FillStyle = Fill.Solid
Draw.Rect(posx, posy, al, 20)
'Draw.Ellipse(200, 200, 100, 50)
Draw.End
al = al + 10
al = al ­ (­10)
END
Menú
PUBLIC SUB _new()
END

17. PUBLIC SUB Form_Open()
END
PUBLIC SUB Acerca_de_Click()
Acercade.Show
END
PUBLIC SUB Cronometro_Click()
Crono.Show
END
PUBLIC SUB Juego_Click()
Jueg.Show
END
PUBLIC SUB Paint_Click()
Pai.Show
END
Cronómetro
PUBLIC SUB Timer1_Timer()
seg.Text = Val(seg.Text) + 1
IF seg.Text = 60 THEN

18. min.Text = Val(min.Text) + 1
seg.Text = 0
ENDIF
IF min.Text = 60 THEN
hor.Text = Val(hor.Text) + 1
min.Text = 0
ENDIF
END
PUBLIC SUB Button1_Click()
IF Button1.Text = "Iniciar" THEN
Timer1.Enabled = TRUE
Button1.Caption = "Parar"
ELSE
Button1.Caption = "Iniciar"
Timer1.Enabled = FALSE
ENDIF
END
PUBLIC SUB Button2_Click()
seg.Text = "0"
min.Text = "0"
hor.Text = "0"
Timer1.Enabled = TRUE
Button1.Caption = "Parar"
END
PUBLIC SUB Button3_Click()
ME.Close
END
PUBLIC SUB Form_Open()
END

19. Para realizar Operaciones Básicas
PUBLIC SUB _new()
END
PUBLIC SUB Form_Open()
END
PUBLIC SUB Label1_MouseDown()
END
PUBLIC SUB Button2_Click()
TextBox1.Text = ""
TextBox2.Text = ""
TextBox3.Text = ""
END
PUBLIC SUB Button1_Click()
TextBox3.Text = TextBox1.Text + TextBox2.Text
END
PUBLIC SUB Button6_Click()
ME.Close
END
PUBLIC SUB Button3_Click()
TextBox3.Text = TextBox1.Text ­ TextBox2.Text
END

20. PUBLIC SUB Button4_Click()
TextBox3.Text = TextBox1.Text * TextBox2.Text
END
PUBLIC SUB Button5_Click()
TextBox3.Text = TextBox1.Text / TextBox2.Text
END
Transformar de números a letras
' Attribute VB_Name = "Module1"
' Option Explicit
PUBLIC FUNCTION EnLetras(numero AS String) AS String
DIM b, paso AS Integer
DIM expresion, entero, deci, flag AS String
flag = "N"
FOR paso = 1 TO Len(numero)
IF Mid(numero, paso, 1) = "." THEN
flag = "S"
ELSE
IF flag = "N" THEN
entero = entero & Mid(numero, paso, 1) 'Extae la parte entera del numero
ELSE
deci = deci & Mid(numero, paso, 1) 'Extrae la parte decimal del numero
END IF
END IF
NEXT
' paso
IF Len(deci) = 1 THEN

21. deci = deci & "0"
END IF
flag = "N"
IF Val(numero) >= ­999999999 AND Val(numero) <= 999999999 THEN 'si el numero esta
dentro de 0 a 999.999.999
FOR paso = Len(entero) TO 1 STEP ­1
b = Len(entero) ­ (paso ­ 1)
SELECT CASE paso
CASE 3, 6, 9
SELECT CASE Mid(entero, b, 1)
CASE "1"
IF Mid(entero, b + 1, 1) = "0" AND Mid(entero, b + 2, 1) = "0" THEN
expresion = expresion & "cien "
ELSE
expresion = expresion & "ciento "
END IF
CASE "2"
expresion = expresion & "doscientos "
CASE "3"
expresion = expresion & "trescientos "
CASE "4"
expresion = expresion & "cuatrocientos "
CASE "5"
expresion = expresion & "quinientos "
CASE "6"
expresion = expresion & "seiscientos "
CASE "7"
expresion = expresion & "setecientos "
CASE "8"
expresion = expresion & "ochocientos "
CASE "9"
expresion = expresion & "novecientos "
END SELECT
CASE 2, 5, 8
SELECT CASE Mid(entero, b, 1)
CASE "1"
IF Mid(entero, b + 1, 1) = "0" THEN
flag = "S"
expresion = expresion & "diez "
END IF
IF Mid(entero, b + 1, 1) = "1" THEN
flag = "S"
expresion = expresion & "once "
END IF
IF Mid(entero, b + 1, 1) = "2" THEN
flag = "S"
expresion = expresion & "doce "

22. END IF
IF Mid(entero, b + 1, 1) = "3" THEN
flag = "S"
expresion = expresion & "trece "
END IF
IF Mid(entero, b + 1, 1) = "4" THEN
flag = "S"
expresion = expresion & "catorce "
END IF
IF Mid(entero, b + 1, 1) = "5" THEN
flag = "S"
expresion = expresion & "quince "
END IF
IF Mid(entero, b + 1, 1) > "5" THEN
flag = "N"
expresion = expresion & "dieci"
END IF
CASE "2"
IF Mid(entero, b + 1, 1) = "0" THEN
expresion = expresion & "veinte "
flag = "S"
ELSE
expresion = expresion & "veinti"
flag = "N"
END IF
CASE "3"
IF Mid(entero, b + 1, 1) = "0" THEN
expresion = expresion & "treinta "
flag = "S"
ELSE
expresion = expresion & "treinta y "
flag = "N"
END IF
CASE "4"
IF Mid(entero, b + 1, 1) = "0" THEN
expresion = expresion & "cuarenta "
flag = "S"
ELSE
expresion = expresion & "cuarenta y "
flag = "N"
END IF
CASE "5"
IF Mid(entero, b + 1, 1) = "0" THEN
expresion = expresion & "cincuenta "
flag = "S"
ELSE

23. expresion = expresion & "cincuenta y "
flag = "N"
END IF
CASE "6"
IF Mid(entero, b + 1, 1) = "0" THEN
expresion = expresion & "sesenta "
flag = "S"
ELSE
expresion = expresion & "sesenta y "
flag = "N"
END IF
CASE "7"
IF Mid(entero, b + 1, 1) = "0" THEN
expresion = expresion & "setenta "
flag = "S"
ELSE
expresion = expresion & "setenta y "
flag = "N"
END IF
CASE "8"
IF Mid(entero, b + 1, 1) = "0" THEN
expresion = expresion & "ochenta "
flag = "S"
ELSE
expresion = expresion & "ochenta y "
flag = "N"
END IF
CASE "9"
IF Mid(entero, b + 1, 1) = "0" THEN
expresion = expresion & "noventa "
flag = "S"
ELSE
expresion = expresion & "noventa y "
flag = "N"
END IF
END SELECT
CASE 1, 4, 7
SELECT CASE Mid(entero, b, 1)
CASE "1"
IF flag = "N" THEN
IF paso = 1 THEN
expresion = expresion & "uno "
ELSE
expresion = expresion & "un "
END IF

24. END IF
CASE "2"
IF flag = "N" THEN
expresion = expresion & "dos "
END IF
CASE "3"
IF flag = "N" THEN
expresion = expresion & "tres "
END IF
CASE "4"
IF flag = "N" THEN
expresion = expresion & "cuatro "
END IF
CASE "5"
IF flag = "N" THEN
expresion = expresion & "cinco "
END IF
CASE "6"
IF flag = "N" THEN
expresion = expresion & "seis "
END IF
CASE "7"
IF flag = "N" THEN
expresion = expresion & "siete "
END IF
CASE "8"
IF flag = "N" THEN
expresion = expresion & "ocho "
END IF
CASE "9"
IF flag = "N" THEN
expresion = expresion & "nueve "
END IF
END SELECT
END SELECT
IF paso = 4 THEN
IF Mid(entero, 6, 1) <> "0" OR Mid(entero, 5, 1) <> "0" OR Mid(entero, 4, 1) <> "0" OR
(Mid(entero, 6, 1) = "0" AND Mid(entero, 5, 1) = "0" AND Mid(entero, 4, 1) = "0" AND
Len(entero) <= 6) THEN
expresion = expresion & "mil "
END IF
END IF
IF paso = 7 THEN
IF Len(entero) = 7 AND Mid(entero, 1, 1) = "1" THEN
expresion = expresion & "millón "
ELSE
expresion = expresion & "millones "
END IF
END IF

25. NEXT
' paso
IF deci <> "" THEN
IF Mid(entero, 1, 1) = "­" THEN 'si el numero es negativo
expresion = "menos " & expresion & "con " & deci & "/100"
ELSE
expresion = expresion & "con " & deci & "/100"
END IF
ELSE
IF Mid(entero, 1, 1) = "­" THEN 'si el numero es negativo
expresion = "menos " & expresion
ELSE
expresion = expresion
END IF
END IF
ELSE 'si el numero a convertir esta fuera del rango superior e inferior
expresion = ""
END IF
TextBox2.Text = expresion
END FUNCTION
PUBLIC SUB Button1_Click()
EnLetras(TextBox1.Text)
' TextBox2.Text = "3"
END
PUBLIC SUB Button3_Click()
TextBox1.Text = ""
TextBox2.Text = ""
END
PUBLIC SUB Button2_Click()
ME.Close
END