CComboBox::Copy
Copies the current selection, if any, in the edit control of the combo box onto the Clipboard in CF_TEXT format.
void Copy( );
Example
// Copy all of the text from the combo box's edit control
// to the clipboard.
m_MyComboBox.SetEditSel(0, -1);
m_MyComboBox.Copy();
Requirements
Header: afxwin.h