The mysterious stock bitmap: There's no way to summon it, but it shows up in various places

A number of stock GDI objects are made available by the function, but one stock GDI object that is mysteriously missing is the stock bitmap. You can't summon the stock bitmap, but it manages to show up in various places, some of them perhaps unexpected. The stock bitmap is a monochrome 1×1 bitmap which GDI uses in various places where it ...