Why there is no information on....?

Why there is no information anywhere on BI_FOURCC ?
Why there is no information anywhere on BI_ALPHABITS ?
Why there is no information on 32 bit Bitmaps?
Why there is no information anywhere on How to embed OLE Browser on your application?
Why there is no information on How to use Memory bitmaps inside your OLE Browser?
Why there is no information on RIL interfaces?
Why there is no information on How to send SMS using RIL?
And why Windows Mobile development requires this much of undocumented information?
And Why Microsoft's own applications completely use different set of unnamed/undocumented APIs?

Well,actually i am really angry,but hey,i managed to find some information on some of questions above.
Hope i can share them with you.