Thank _Superman_
But They don't work...
HWND hToolbar;
TBBUTTON TB_Data;
HWND hWnd = ::FindWindow(0, L"Test window");
hToolbar = ::FindWindowEx(hWnd, 0, L"ToolbarWindow32", 0);
::SendMessage(hToolbar, TB_GETBUTTON, (WPARAM)6 , (LPARAM)&TB_Data);
::SendMessage(hToolbar, TB_PRESSBUTTON, TB_Data.idCommand, (LPARAM)TRUE);
::SendMessage(hToolbar, TB_PRESSBUTTON, TB_Data.idCommand, (LPARAM)FALSE);