The CDM_SETCONTROLTEXT message sets the text for the specified control in an Explorer-style Open or Save As common dialog box. The dialog box must have been created with the OFN_EXPLORER flag; otherwise, the message fails.
CDM_SETCONTROLTEXT wParam = (WPARAM) id; lParam = (LPARAM) (LPSTR) text; // corresponding macro void CommDlg_OpenSave_SetControlText(hdlg, id, text)
No return value.