How to change window brightness and transparency?

[cloud1]

Hi everyone,

Can someone tell me how to change window brightness and transparency with a certain key combination, for example: alt+shift+up/down arrow?

By this I mean: What libraries do I need to use in order to achieve this, for example: window.h and etc?

As for the transparency is "true transparency" possible? If possible, how do I achieve this effect? What I mean by "true transparency" is that the window is transparent or not very opaque, but the text including the title bar text on the window are not very transparent or very opaque.

Thanks.