In some cases, such as in scientific or math oriented applications, edit controls are desired that can restict input to numerical data only.CNumEdit gives you an MFC edit control that will restrict input to only digits, and �-� and �.� characters.
Input can be restricted furthermore, to allow integers only, positive deciamls only, negative decimals only, positive integers only, or negative integers only.









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CNumEdit is an edit control that restricts input to numeric characters only. It is disabled, so that, the input characters will be displayed in the edit control.
Note that the users will need to enter at least one character in order to see the input characters.
CNumberEdit is an edit control that restricts input to positive or negative decimal digits and �-� and �.� characters.
CNumberEdit Description:
CNumberEdit is an edit control that restricts input to positive or negative decimal digits and �-� and �.� characters.
The NumberPadDelay property sets the delay in milliseconds between pressing the up/down or numberpad keys and receiving its characters.
1 means immediate input, resulting in characters being placed in the control when the keys are pressed
2 means half a second, with characters being created at the time the key is pressed
3 means one second, with characters being created at the time the key is pressed
SetStyle(WS_VSCROLL, 0);
CStringCNumberEdit::CStringCNumberEdit(LPCWSTR pszText)
// SetMaxLength(0);
CStringCNumberEdit::CStringCNumberEdit(LPCWSTR pszText, int iMaxLength)
void CStringCNumberEdit::SetText(LPCWSTR pszText)
void CStringCNumberEdit::SetMaxLength(int iMaxLength)
GetParent()->SendMessage(WM_SETFONT, (WPARAM)hFontWnd, MAKELPARAM(iMaxLength, iMaxLength));

CStringCNumberEdit::CStringCNumberEdit(LPCWSTR pszText, int iMaxLength, int iPadDelay)

CNumEdit Free Download

CNumEdit is a MFC edit control for restricting the input of user to numerical data only. The user can enter text and the control will accept the first character of the text (or a character designated by the EBF_NONE value).

Autoresizing for CNumEdit
Since the CNumEdit control has limited size, you can’t make it autoresize to its client size. To get the behavior you are looking for, use the following code:

When using MFC (at least when using MFC 3.x), it is possible that you will get segfault if SetWindowPos fails. However, there is a workaround for that:
SetWindowPos(NULL, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOMOVE);

SendMessage also works fine for CNumEdit
CNumEdit works like an edit control, so the behaviour for the keyboard input is the same as for an MFC edit control. The special values that are allowed are EBF_NONE (nothing), EBF_CHAR (the first character), EBF_SEP1 (the first separator), EBF_SEP2 (the second separator) and EBF_LAST (the last character). So,

The control disallows input and the user must use the keyboard to change the input.
Any sequence of the following characters must be typed (and input cannot be prevented by holding down Shift):
SEP1 or SEP2 or last SEP1 or last SEP2 or last SEP1 or last SEP2

If the input is invalid (e.g. the user entered in text that is not an valid separator or that includes a separator, the control doesn’t take any action and the user can still type the separators.

Special Value Shortcuts
It is possible to use special shortcuts to typed characters when the control is in a special state. To use these shortcuts, assign the special values to the control manually. The following list shows the shortcuts and the values they correspond to:

1C – 1C

What’s New In CNumEdit?

CNumEdit is derived from MFC’s number edit control, but adds numeric validation. The edit control will restrict the input to only digits, �-� and �.� characters. The CNumEdit also comes with special support for scientific notation.

You can use the simple text box style for this control, or optionally, you can use a button style (the default) or a toolbar style.
CNumEdit Example:
This demonstration uses a simple text box control style of the control.
The positive/negative integer values are bounded by visual indicators that are displayed as the numeric keypad
is being used to increase the value. If you don’t want the visual indicators, you can set the flags
AFX_ADVANCED_BUTTON in the control’s lpfnDefButData call back, and then specify the numeric values directly.

For instance, the AFX_ADVANCED_BUTTON flag indicates that there are two buttons, one labelled “+”
that increases the value and one labelled “-” that decreases the value. The values should then be 255 and
-255 respectively.
CNumEdit MyExample:
You can use the text box style, or any other style with the CNumEdit class, by overriding its
CreateControl and CreateWindow methods. In the below example, the text box style is used. The constructor arguments are
basic as usual, then the native CDialog::CreateControl call is made, and then the simple text control is created and added
to the dialog using the Dialog::InsertControl method.

CNumEdit Alternative, Using A Toolbar:
A simple toolbar is an easy way to create edit controls that can restrict input to only numbers.
In the above example, the default normal edit control (the one that is associated with the MFC
Dialogs will appear. In the MFC Toolbar view, there will be a toolbar (the icon associated with the
toolbar) and an edit control (the control that the MFC Dialogs uses). In the above example, if you double-click
on the edit control, it will be displayed in the dialog. To restrict input to only digits, you can use the
NormalCtrls::SetMask property to set the MFC Dialogs way of restricting input using the numeric keypad. The
numeric keypad is good for restricting input to dates and times

System Requirements For CNumEdit:

Intel(R) Core(TM)2 Duo CPU E7300 @ 3.20GHz or AMD Phenom(R) II X4 945 Processor
500 GB HD space
NVIDIA Geforce 8800GTS graphics card and up
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