The document contains code for multiple programs including a screen protector program, calculator program, identification card validation program, lottery game program, and invoice program. The code defines variables and subroutines to handle events like button clicks and draws graphics.

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