C# Signature:
[DllImport ("coredll.dll", EntryPoint="waveOutOpen", SetLastError=true)]
public static extern int waveOutOpen(out IntPtr t, int id, WaveFormatEx pwfx, IntPtr dwCallback, int dwInstance, int fdwOpen);
VB Signature:
(TODO) As TODO
User-Defined Types:
None.
Alternative Managed API:
Do you know one? Please contribute it!
Notes:
Taken from openNetCF in OpenNETCF.Win32.Wave
Tips & Tricks:
Please add some!
Sample Code:
using System;
using System.Data;
using System.Runtime.InteropServices;
namespace waveoutopen
{
class Tester
{
static void Main(string[] args)
{
Tester t = new Tester();
t.Run();
}
public void Run()
{
WAVEFORMATEX testFormat = new WAVEFORMATEX();
testFormat.wFormatTag = 1;
testFormat.wBitsPerSample = 16; // 8,16
testFormat.nChannels = 2;
testFormat.nSamplesPerSec = 44100;
testFormat.nBlockAlign = (ushort)(testFormat.nChannels *
(testFormat.wBitsPerSample / 8));
testFormat.nAvgBytesPerSec = (testFormat.nSamplesPerSec *
testFormat.nBlockAlign);
testFormat.cbSize = 0;
IntPtr m_hwi = IntPtr.Zero;
IntPtr hwnd = IntPtr.Zero;
MMSYSERR result = waveOutOpen(ref m_hwi, WAVE_MAPPER,
ref testFormat, 0, 0, 0);
Console.WriteLine("and the result of open is {0}",result.ToString());
Console.WriteLine("End Of Run - Enter to Quit");
Console.ReadLine();
}
private const int MMSYSERR_BASE = 0;
public const uint WAVE_MAPPER = unchecked((uint)(-1));
public enum MMSYSERR : int
{
NOERROR = 0,
ERROR = (MMSYSERR_BASE + 1),
BADDEVICEID = (MMSYSERR_BASE + 2),
NOTENABLED = (MMSYSERR_BASE + 3),
ALLOCATED = (MMSYSERR_BASE + 4),
INVALHANDLE = (MMSYSERR_BASE + 5),
NODRIVER = (MMSYSERR_BASE + 6),
NOMEM = (MMSYSERR_BASE + 7),
NOTSUPPORTED = (MMSYSERR_BASE + 8),
BADERRNUM = (MMSYSERR_BASE + 9),
INVALFLAG = (MMSYSERR_BASE + 10),
INVALPARAM = (MMSYSERR_BASE + 11),
HANDLEBUSY = (MMSYSERR_BASE + 12),
INVALIDALIAS = (MMSYSERR_BASE + 13),
BADDB = (MMSYSERR_BASE + 14),
KEYNOTFOUND = (MMSYSERR_BASE + 15),
READERROR = (MMSYSERR_BASE + 16),
WRITEERROR = (MMSYSERR_BASE + 17),
DELETEERROR = (MMSYSERR_BASE + 18),
VALNOTFOUND = (MMSYSERR_BASE + 19),
NODRIVERCB = (MMSYSERR_BASE + 20),
LASTERROR = (MMSYSERR_BASE + 20),
BADFORMAT = (MMSYSERR_BASE + 32)
}
[DllImport ("coredll.dll")]
private static extern MMSYSERR waveOutOpen(
ref IntPtr phwo,
uint uDeviceID,
ref WAVEFORMATEX pwfx,
uint dwCallback,
uint dwInstance,
uint fdwOpen
);
[StructLayout(LayoutKind.Sequential)]
public unsafe struct WAVEFORMATEX
{
public ushort wFormatTag;
public ushort nChannels;
public uint nSamplesPerSec;
public uint nAvgBytesPerSec;
public ushort nBlockAlign;
public ushort wBitsPerSample;
public ushort cbSize;
}
}
}
