Encryption Program (help me please)

(To the moderators, please change the name to: Encryption Program (help me please), thank you!)

I navigate for 4 days the web and I haven't found nothing that could help me to solve my problem.

I re-created a keyboard on the screen, I have 26 buttons (letters form A-Z), two edit controls, one for the text that I write with the keyboard and one for the encrypted text, I also have re-created a second keyboard where I need to display the encrypted letter that in that moment is associated to the letter that I have pressed.

I thought to use this method: when I press Q button, for example, in the plain text I can read Q(did), in the encrypted I can read J, for example(did), and I have to see in the second keyboard the J letter, but I don't know how I can apply this last thought to my code!
Here there's the part of code of a pressed button (i.e. Q)

Code:

................
DDX_Control(pDX, IDC_CHECK1, m_Btn1);
................
ON_BN_CLICKED(IDC_BUTTON_Q, OnBnClickedButtonQ)
................
BOOL CTestDlg::OnInitDialog()
{
        m_ToolTip.Create(this);
	m_ToolTip.AddTool( &m_Btn1, IDS_TT_BTN1 );
................
        //Set images
	m_Btn1.SetImage( IDB_Q, 28 );
................
        // set the initial state of buttons
	m_Btn1.Depress(false);
................
}

void CTestDlg::OnBnClickedButtonQ()
{
//	keybd_event(VkKeyScan('Q'),0x90,0 , 0); // ‘Q’ Press

	m_Btn1.Depress(!m_Btn1.IsDepressed()); // when I press 'Q' in the second keyboard I see 'Q' instead of 'J', or another letter

	//=========================
	//Get the Pressed Letter
	//=========================
	LPTSTR item = "Q";
................
................
}

P.S.: on the second keyboard when I press the 'Q' button or other button, I have to see everytime a different letter, there's no a standard association between the pressed letter and the letter displayed in the encrypted field.

Hope in some important help, because I really don't know how can I do.

Sorry not sure I understand exactly what you want....

>>I also have re-created a second keyboard where I need to display the encrypted letter

You will need to change the letters on the second keyboard each time you change the encryption.

You must have some form of mapping (1st keyboard 'Q' == 2nd keyboard 'J')

Use SetWindowText() or SetImage() to change the letters the second keyboard dispalys each time you change the encryption.

You must have some form of mapping (1st keyboard 'Q' == 2nd keyboard 'J')

Yeah but I don't know how can I do this, because there's no standard association between the letters, for example:

First time:
Q(on the 1st keyb)->Z(on the 2st keyb)
Second time:
Q(on the 1st keyb)->A(on the 2st keyb)

It changes everytime that I press the button....

I thought to use SetWindowText() or similar in the functions:
OnBnClickedButtonA()
OnBnClickedButtonB()
.........
.........
OnBnClickedButtonZ()

but I'm thinking how!

Nothing, I really don' know how can I integrate those functions in the 26 functions of that I create for every buttons of the keyboard!

How did you create the buttons?
resource editor or with CreateWindow()?

Give the buttons consecutive ID numbers. Edit resource.h as required. This will enable you to have one button handler and just pass in the ID number.

ie
'A' = 40000
'B' = 40001
...
...
'Z' = 40025

Process WM_COMMAND, checking for BN_CLICKED (HIWORD), the LOWORD is the ID number of the button.

Button pressed can be calculated by subtracting the ID number of the first letter from the LOWORD.
This can then be used as an index to your array.

I used the resource editor, I "really" created the button.

This can then be used as an index to your array.

But I don't have an array, I have:

BtnA, BtnB, ........, BtnZ.

But now I try to encode your way, that's really good!
Thank you!

Process WM_COMMAND

Unfortunatelly I don't have a sort of "Window Procedure" like 'WndProc' or similar so I don't have WM_COMMAND.

I'm really freezed on this modification!

>>But I don't have an array, I have:

You should...or some sort of collection to link the data together.

>>Unfortunatelly I don't have a sort of "Window Procedure" like 'WndProc' or similar so I don't have WM_COMMAND.

You do. MFC just hides it from you.

Look at CWnd::OnCommand() (not CButton)

GET_WM_COMMAND_ID() //windowsx.h
GET_WM_COMMAND_HWND() //windowsx.h