Allocating a Text Buffer When the system creates an edit control, it automatically creates a text buffer, sets its initial size, and increases the size as necessary. The size can be up to a predefined limit of approximately 32 kilobytes for single-line edit controls.
If your graphics card is using the new Vista driver model then GDI/GDI+ has *NO* hardware acceleration. In practise this shouldn't be a big deal since the CPUs are so darn fast these days.