Obtaining a value from a text box

I'm working with MSVC++. I have a GUI with button and a text box. When I push the button the function CDLG::OnButtonPush() gets executed. This in turn calls the function SomeFunction(). The text box on my GUI has a value, say, 12.0 "held" in it. How do I get the function SomeFunction(), or CDLG::OnButtonPush() for that matter, to use the value held in the text box?

Here is some of my code:

Code:

void CDLG::OnButtonPush() 
{
	
	SomeFunction();

	
}

void CDLG::OnEnChangeEdit1()
{
	// TODO:  If this is a RICHEDIT control, the control will not
	// send this notification unless you override the CDialog::OnInitDialog()
	// function and call CRichEditCtrl().SetEventMask()
	// with the ENM_CHANGE flag ORed into the mask.

	// TODO:  Add your control notification handler code here
}

Is this MFC or does it only look like it?

In MFC dialogs, you call UpdateData with the right TRUE/FALSE parameter (can never remember) to synchronize the contents of the box with the member representing it. Then you just use the result.

In non-MFC, you send a WM_GETTEXT message to the box.