Volume control for Windows XP

[probine]

I want to write a program that allows me to control the volume, specifically the Line in volume in my computer.

The program should be able to read how loud the volume is and adjust it.

Any ideas ? What QT classes could I use ?

[wysota]

Why would you think Qt handles such things as modifying sound volume on WindowsXP?

[MarkoSan]

Hmm, I think you should visually choose one of the Qt's widgets such as QDial or combination of QProgresBar and QSlider to get volume percentage (0-100%). Then, you must use Windows API to change volume settings of sound card.