The SetDlgItemText function sets the title or text of a control in a dialog box. 

BOOL SetDlgItemText(

    HWND hDlg,	// handle of dialog box
    int nIDDlgItem,	// identifier of control
    LPCTSTR lpString 	// text to set
   );	
 

Parameters

hDlg

Identifies the dialog box that contains the control. 

nIDDlgItem

Identifies the control with a title or text that is to be set. 

lpString

Points to the null-terminated string that contains the text to be copied to the control.