Copy

// Get selected text and paste into the clipboard
void CFormClass::OnCopy()
{
	if(::GetFocus() == m_EditBox.m_hWnd)
	{
		// Get the whole text
		CString strText;
		m_EditBox.GetWindowText(strText);

		// extraxt the only selected area of the text
		int iStart = 0;
		int iEnd = 0;
		m_EditBox.GetSel(iStart, iEnd);
		strText = strText.Mid(iStart, strText.GetLength() - iEnd);

		// put to clipboard
		SetClipboardText(strText);
	}
}

Paste

// replace selected text with text from the clipboard
void CFormClass::OnPaste()
{
	if(::GetFocus()== m_EditBox.m_hWnd)
	{
		// Get the whole text
		CString strText;
		m_EditBox.GetWindowText(strText);

		// what should be added
		CString strNewText = GetClipboardText();

		// remove selection from the text
		int iStart = 0;
		int iEnd = 0;
		m_EditBox.GetSel(iStart, iEnd);
		strText.Delete(iStart, strText.GetLength() - iEnd);

		// put the new text on the right position and show the text
		strText.Insert(iStart, strNewText);
		m_EditBox.SetWindowText(strText);

		// set the cursor
		int iCurPos = iStart + strNewText.GetLength();
		//m_EditBox.SetSel(iStart, iCurPos);		// the new pastet text is selected
		m_EditBox.SetSel(iCurPos, iCurPos);		// cursor on the end of the pasted text
	}
}

Paste

void CFormDialog::OnPaste()
{
	HWND focus = ::GetFocus();
	CEdit *Element = NULL;
	if(focus == m_Edit.m_hWnd)
		Element = &m_Edit;
	// for additional edit boxes, simply ask and assign here

	if(Element)
	{
		// Get the whole text
		CString strText;
		Element->GetWindowText(strText);

		// Get clipboard text
		CString strNewText = GetClipboardText();

		// Delete the selected area from the text
		int iStart = 0;
		int iEnd = 0;
		Element->GetSel(iStart, iEnd);
		strText.Delete(iStart, iEnd - iStart);

		// Add the new text inside
		strText.Insert(iStart, strNewText);

		// Set the new text and set the cursor after it
		Element->SetWindowText(strText);
		int iCurPos = iStart + strNewText.GetLength();
		Element->SetSel(iCurPos, iCurPos);
	}
}

Copy

void CFormDialog::OnCopy()
{
	HWND focus = ::GetFocus();
	CEdit *Element = NULL;
	if(focus == m_Edit.m_hWnd)
		Element = &m_Edit;
	// for additional edit boxes, simply ask and assign here

	if(Element)
	{
		// Get the whole text
		CString strText;
		Element->GetWindowText(strText);

		// Get the selected area from the text
		int iStart = 0;
		int iEnd = 0;
		Element->GetSel(iStart, iEnd);
		strText = strText.Mid(iStart, iEnd - iStart);

		// Set the cplipboard text
		SetClipboardText(strText);
	}
}

wenn SetClipboardText oder GetClipboardText als member einer klasse sind, muss
OpenClipboard ohne argumente aufgerufen werden

void CFormDialog::OnSelectAll()
{
	HWND focus = ::GetFocus();
	CEdit *Element = NULL;
	if(focus == m_Edit.m_hWnd)
		Element = &m_Edit;
	// for additional edit boxes, simply ask and assign here

	if(Element)
		Element->SetSel(0, Element->GetWindowTextLength());
}