Sets the caption or text of a control owned by a window or dialog box.
void SetDlgItemText(
   int nID,
   LPCTSTR lpszString 
);
Parameters
- nID 
 Identifies the control whose text is to be set.
- lpszString 
 Points to a CString object or null-terminated string that contains the text to be copied to the control.
Remarks
SetDlgItemText sends a WM_SETTEXT message to the given control.
Example
// The following code fragment is from CMyDlg::OnInitDialog
// CMyDlg is derived from CDialog.
// Initialize dialog controls
SetDlgItemText(IDC_EDITNAME, _T("Type in text")); 
SetDlgItemInt(IDC_EDITNUM, 100);
Requirements
Header: afxwin.h