Title: How to manipulate Buttons in the OpenDialogs Toolbar
uses
CommCtrl;
// Beispiel: Blendet den Button zum Erzeugen eines neuen Verzeichnisses aus.
// Example: Hide the "Create New Folder" Button.
procedure TForm1.OpenPictureDialog1Show(Sender: TObject);
const
TB_BTN_NEWFOLDER = 40962;
var
hWndToolbar, wnd: HWND;
tbInfo: TTBButtonInfoA;
begin
tbInfo.cbSize := SizeOf(TTBButtonInfo);
tbInfo.dwMask := TBIF_STATE;
tbinfo.fsState := TBSTATE_HIDDEN or TBSTATE_INDETERMINATE;
hWndToolbar := FindWindowEx(GetParent((Sender as TOpenPictureDialog).Handle), 0,
'ToolbarWindow32', nil);
SendMessage(hWndToolbar, TB_SETBUTTONINFO, TB_BTN_NEWFOLDER ,LParam(@tbinfo));
end;