To control system volume with c#

[session]

How To - control system volume with c#???

Thanks for help!

[CornedBee]

DirectSound/Show or API import.

[session]

yeah i know but how? im a newbie i don't really know how to do it

[CornedBee]

I don't know how to use P/Invoke, but this is the code I used for setting the volume in C++:

void SetVolume(WORD vol)
{
	HWAVEOUT hWO;
	WAVEFORMATEX wf;
	wf.cbSize = 0;
	wf.nAvgBytesPerSec = 22050;
	wf.nBlockAlign = 1;
	wf.nChannels = 2;
	wf.wBitsPerSample = 16;
	wf.nSamplesPerSec = 22050;
	wf.wFormatTag = WAVE_FORMAT_PCM;
	waveOutOpen(&hWO, WAVE_MAPPER, &wf, reinterpret_cast<DWORD_PTR>(hwnd),
		0, CALLBACK_WINDOW);
	waveOutSetVolume(hWO, MAKELONG(vol, vol));
	waveOutClose(hWO);
}

If you have the complete Visual Studio.Net you can compile this code to a Managed C++ class library:

// This is the main DLL file.


#using <mscorlib.dll>

#include <windows.h>

namespace CornedBee
{
	public __gc class AudioUtils
	{
	public:
		static void SetVolume(System::UInt16 volume)
		{
			::HWAVEOUT hWO;
			::WAVEFORMATEX wf;
			wf.cbSize = 0;
			wf.nAvgBytesPerSec = 22050;
			wf.nBlockAlign = 1;
			wf.nChannels = 2;
			wf.wBitsPerSample = 16;
			wf.nSamplesPerSec = 22050;
			wf.wFormatTag = WAVE_FORMAT_PCM;
			::waveOutOpen(&hWO, WAVE_MAPPER, &wf, 0, 0, 0);
			::waveOutSetVolume(hWO, MAKELONG(volume, volume));
			::waveOutClose(hWO);
		}
	};
}

You must add winmm.lib to the linker input include libraries.

Actually this only sets the wave volume, I don't know how to set the real system volume.