Solved

# No Drive Calculator

Posted on 2009-05-02
593 Views
Hello everyone,

Ive been trying to create this calculator from this site: www.wisdombay.com:80/hidedrive
To a Visual Basic project, but i got to a point where i get confuse in the number order,
can someone help me?

Thanks

i wonder if someone can help me to do it like the one in the page above.
This is what i have so far, and works ok, but just with some desperfections.
``````If Check1.Value = 1 Then 'A

Label1.Caption = "1"

End If

If Check2.Value = 1 Then 'B

Label1.Caption = "2"

End If

If Check3.Value = 1 Then 'C

Label1.Caption = "4"

End If

If Check4.Value = 1 Then 'D

Label1.Caption = "8"

End If

If Check5.Value = 1 Then 'E

Label1.Caption = "16"

End If

If Check6.Value = 1 Then 'F

Label1.Caption = "32"

End If

If Check7.Value = 1 Then 'G

Label1.Caption = "64"

End If

If Check8.Value = 1 Then 'H

Label1.Caption = "128"

End If

If Check9.Value = 1 Then 'I

Label1.Caption = "256"

End If

If Check10.Value = 1 Then 'j

Label1.Caption = "512"

End If

If Check11.Value = 1 Then 'k

Label1.Caption = "1024"

End If

If Check12.Value = 1 Then 'L

Label1.Caption = "2048"

End If

'And so on...
``````
0
Question by:at_the_biginning
• 17
• 6
• 6
• +1

LVL 76

Expert Comment

If you are using traditional VB (1 to 6) it is easier to have an array of checkboxes.

Put the first checkbox (with caption "A") on the form and set its index to 0 in the Properties pane.
``````Option Explicit

Dim r As Integer

Dim c As Integer

Dim i As Integer

Dim sngHorizontal As Single

Dim sngVertical As Single

sngHorizontal = 800

sngVertical = 400

For i = 1 To 25

r = i \ 5

c = i Mod 5

Check1(i).Left = Check1(0).Left + c * sngHorizontal

Check1(i).Top = Check1(0).Top + r * sngVertical

Check1(i).Visible = True

Check1(i).Caption = Chr\$(Asc("A") + i)

Debug.Print i, c, r, Check1(i).Caption

Next i

End Sub

Private Sub Command1_Click()

Dim n As Long

Dim i As Integer

For i = 0 To 25

If Check1(i).Value Then

n = n + 2 ^ (i + 1)

End If

Next i

Label1.Caption = n

End Sub
``````
0

Author Comment

Hello GrahamSkan,

Good, but i am not getting the same results i am getting from my calculator neither the original.
What i need is to get the exact calculation like the one in the page, and with all the alphabet.

i considered mine to be ok, the only problem i have is that when you click on a letter closer to Y, Z or X,
i don't get a good calculation, it works but only if i check one by one, for example, in the original calculator
you can check mark on F, K, U, R, etc, like a mix of check boxes and it will give you the right calculation.

but the one i made, it give me the right calculation but one by one, if i do what i just explain to you, i get
an unknown calculaion, and i don't want.

Lets take a look at your example code...
if i check and click on the letter F, i get the result of 64 when im supposed to get 32.

0

LVL 76

Expert Comment

Try changing line 28 from

n = n + 2 ^ (i + 1)
to
n = n + 2 ^ I
0

Author Comment

Excellent, perfect :-)
But can you please tell me how can i get to show the rest of the check boxes?
Right now i am getting only 6, and they astart in this orders: Check1, F, K, P, U, Z.

There is a total of 26 Check Boxes.

0

LVL 76

Expert Comment

Is there enough space to see them on the right of the first column? Also. make sure that the whole checkbox and its caption are not so wide that the boxes of one columns are covering each other. The Width property in my test is 495.
0

Author Comment

Sorry for the delay,

Well the way i made my first project is exactly like the one in the page.
i wonder if i can make your example the same i did with my first project.
Something like this example:

A            B            C            D            E
F            G            H            I            J
K            L            M            N            O
P            Q            R            S            T
U            V            W            X            Y
Z

0

LVL 76

Expert Comment

I have deleted my test VB project now, but that layout corresponds to what it looked like to me. If you are getting anything different then I suggest that you attach your form file here, and we will try to see where your form is different.
I don't know if a .frm file is accepted at the moment, but if it isn't, change the extension to say, .txt, and tell us.
0

Author Comment

Thanks GrahamSkan,

Here is my example.

Note: this project doesn't have nothing from your example, this is the project i was working on.
but you'll everything in place, like all the check boxes and so on, so check it out, thanks Graham.

Form1.txt
0

Author Comment

Sorry GrahamSkan, is that sometimes i have problem with my typing or writing,
I write things upside down, and thats what i just did, so i hope you understand me.

Thanks
0

Author Comment

Hello again, GrahamSkan,

Could you please tell me the comclusion of this question?
I would like to hear from you again, i need more suggestions from you on this question.

Thanks
0

LVL 96

Expert Comment

Easy way:

``````    <Flags()> _

Public Enum NoDrive

A = &H1

B = &H2

C = &H4

D = &H8

E = &H10

F = &H20

G = &H40

H = &H80

I = &H100

J = &H200

K = &H400

L = &H800

M = &H1000

N = &H2000

O = &H4000

P = &H8000

Q = &H10000

R = &H20000

S = &H40000

T = &H80000

U = &H100000

V = &H200000

W = &H400000

X = &H800000

Y = &H1000000

Z = &H2000000

End Enum

Dim value As Integer = CInt(NoDrive.A Or NoDrive.B Or NoDrive.C Or NoDrive.D Or NoDrive.E)   ' 31
``````
0

Author Comment

Hi TheLearnedOne,

This is not VB6 is it?
it looks more like VB.NET

Thanks
0

LVL 96

Expert Comment

Same tune, different note:

``````    Enum NoDrive

A = &H1

B = &H2

C = &H4

D = &H8

E = &H10

F = &H20

G = &H40

H = &H80

I = &H100

J = &H200

K = &H400

L = &H800

M = &H1000

N = &H2000

O = &H4000

P = &H8000

Q = &H10000

R = &H20000

S = &H40000

T = &H80000

U = &H100000

V = &H200000

W = &H400000

X = &H800000

Y = &H1000000

Z = &H2000000

End Enum

Dim value As Integer

value = A Or B Or C Or D Or E   ' 31
``````
0

LVL 49

Expert Comment

For combinations of drives, just add the values together.  In this case, that will work as well as the OR operation that TheLearnedOne used.
Most people slept through the DP 101 class where they taught about binary values and how to combine them and use them as boolean flags.
0

Author Comment

Hello guys,

But.. can any of you tell me how to accomplish this code onto my project?
The way GrahamSkan had it was almost fine, Check boxes and the buttom.
except for the rest of the Check boxes.

0

LVL 96

Expert Comment

Build a CheckBox control array, and set the Tag property to the enum.  Loop through the controls, and get the enum value from the Tag property, and sum the checked values (as Dan Rollins has suggested).
0

Author Comment

I am not sking for the whole work to be done, but atleast an example on how to use this code.
thats all.

Never seen this code, and don't know how to deal with it. so can you explain how to use it?

Thanks
0

LVL 96

Expert Comment

1) The code that you have created doesn't use control arrays.

2) GrahamSkan showed you how to create control arrays:

You can also do this with the designer, by copying and pasting the CheckBox control, and it asks you if you want to create a control array.

3) Looping through controls:

Dim sum As Integer
For i = 1 To 26
If Check1(i).Value = 1 Then
sum = sum + Check1(i).Tag
Next i
0

Author Comment

Compile error: Variable not defined

Dim sum As Integer
For i = 1 To 26
If Check1(i).Value = 1 Then
sum = sum + Check1(i).Tag
Next i
0

LVL 96

Expert Comment

Coding in the comment block will do that!!

Dim i As Integer

For i = 1 To 26 will only work if you have a control array that starts at 1.  If it starts at 0 that would be For i = 0 to 25.
0

Author Comment

Ok, look, i tried this with my old project, and i also with GrahamSkan example,
and it doesn't work with none of them.

And i wonder whether TheLearnedOne code actually works or not,
Because if i copy and paste TheLearnedOne code onto my project,
Immediately i get an error pointing to this part of the code:
value = A Or B Or c Or D Or E <======

I liked the way GrahamSkan did it, simple and easy.

Thanks

0

Author Comment

"For i = 1 To 26 will only work if you have a control array that starts at 1.
If it starts at 0 that would be For i = 0 to 25."

I tried the other way, then i get this error:

Compile error: Wrong number of arguments or invalid property assignment.

0

LVL 96

Expert Comment

I don't have VB6 anymore to test anything, so I hope you find a solution to your problem.
0

Author Comment

You left me half way... Thanks anyway.
i just wanted to say that i knew that code don't work.
Yeah the "Enum NoDrive, A = &H, B = &H2" and so on.
I expected an explanation on how the code works, but is ok.

Thanks anyway.
0

LVL 49

Expert Comment

I don't have VB eieither and I don't have the time to explain control arrays.  However, using the code you provided, you can make this work.

``````Total=0

If Check1.Value = 1 Then 'A

Total= Total+1

End If

If Check2.Value = 1 Then 'B

Total= Total+2

End If

If Check3.Value = 1 Then 'C

Total= Total+4

End If

If Check4.Value = 1 Then 'D

Total= Total+8

End If

If Check5.Value = 1 Then 'E

Total= Total+16

End If

If Check6.Value = 1 Then 'F

Total= Total+32

End If

If Check7.Value = 1 Then 'G

Total= Total+64

End If

. ... etc...

Label1.Caption = Total
``````
0

Author Comment

I am trying to get out of my example, not to get in to it.

I would like someone to rebuild GrahamSkan project example,
that will be the only hope in this case.

Thanks
0

LVL 76

Expert Comment

Sorry; been off-line for multiple reasons. Here is a form with the code that I suggested.
``````VERSION 5.00

Begin VB.Form Form1

BorderStyle     =   1  'Fixed Single

Caption         =   "Form1"

ClientHeight    =   3255

ClientLeft      =   45

ClientTop       =   435

ClientWidth     =   3075

MaxButton       =   0   'False

MinButton       =   0   'False

ScaleHeight     =   3255

ScaleWidth      =   3075

StartUpPosition =   3  'Windows Default

Begin VB.CommandButton Command1

Caption         =   "Command1"

Height          =   495

Left            =   120

TabIndex        =   1

Top             =   2520

Width           =   2775

End

Begin VB.CheckBox Check1

Caption         =   "A"

BeginProperty Font

Name            =   "MS Sans Serif"

Size            =   8.25

Charset         =   0

Weight          =   700

Underline       =   0   'False

Italic          =   0   'False

Strikethrough   =   0   'False

EndProperty

Height          =   255

Index           =   0

Left            =   120

TabIndex        =   0

Top             =   120

Width           =   495

End

Begin VB.Label Label1

Alignment       =   2  'Center

Caption         =   "Label1"

Height          =   255

Left            =   720

TabIndex        =   2

Top             =   2040

Width           =   2175

End

End

Attribute VB_Name = "Form1"

Attribute VB_GlobalNameSpace = False

Attribute VB_Creatable = False

Attribute VB_PredeclaredId = True

Attribute VB_Exposed = False

Option Explicit

Dim r As Integer

Dim c As Integer

Dim i As Integer

Dim sngHorizontal As Single

Dim sngVertical As Single

sngHorizontal = 800

sngVertical = 400

For i = 1 To 25

r = i \ 5

c = i Mod 5

Check1(i).Left = Check1(0).Left + c * sngHorizontal

Check1(i).Top = Check1(0).Top + r * sngVertical

Check1(i).Visible = True

Check1(i).Caption = Chr\$(Asc("A") + i)

Debug.Print i, c, r, Check1(i).Caption

Next i

End Sub

Private Sub Command1_Click()

Dim n As Long

Dim i As Integer

For i = 0 To 25

If Check1(i).Value Then

n = n + 2 ^ (i + 1)

End If

Next i

Label1.Caption = n

End Sub
``````
0

Author Comment

Hey hello GrahamSkan!, is good to see you again :-)

Like always the code works like a charm, but only one thing is that the letter E is missing
and the code start counting from 2 and on, instead of 1. for example if you check mark the
letter A and press the buttom you get 2 when you suppose to get 1, then the rest of the code
it keep generating like these: 2, 4, 6, 8, and so on, etc. could this be because of the missing E?

I tried to fix the control array element but i could not, as i don't know that much about array elements.

This is the order of the respective calculation for each letter:

A = 1
B = 2
C = 4
D = 8
E = 16
F = 32
G = 64
H = 128
I  = 256
J = 512
K = 1024
L = 2048
M = 4096
N = 8192
O = 16384
P = 32768
Q = 65536
R = 131072
S = 262144
T = 524288
U = 1048576
V = 2097152
W = 4194304
X = 8388608
Y = 16777216
Z = 33554432

Thank you again GrahamSkan

0

Author Comment

Oh! No! ...My Bad! letter E is not missing!
after resizing the form i found letter E :-)
Now the only thing is the giving number.

Letter A has been excluded, the calculation start from B and on, and is not given the right calculation.

Sorry GrahamSkan
0

LVL 76

Accepted Solution

GrahamSkan earned 500 total points
I pasted in the original code, forgetting that there was an error in it. It is now corrected (again) in this version.
``````Option Explicit

Dim r As Integer

Dim c As Integer

Dim i As Integer

Dim sngHorizontal As Single

Dim sngVertical As Single

sngHorizontal = 800

sngVertical = 400

For i = 1 To 25

r = i \ 5

c = i Mod 5

Check1(i).Left = Check1(0).Left + c * sngHorizontal

Check1(i).Top = Check1(0).Top + r * sngVertical

Check1(i).Visible = True

Check1(i).Caption = Chr\$(Asc("A") + i)

Debug.Print i, c, r, Check1(i).Caption

Next i

End Sub

Private Sub Command1_Click()

Dim n As Long

Dim i As Integer

For i = 0 To 25

If Check1(i).Value Then

n = n + 2 ^ i

End If

Next i

Label1.Caption = n

End Sub
``````
0

Author Comment

Hey GrahamSkan, I knew i can count on you :-)
The project is working perfect with no problems.
Thank you for all your help.
0

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