/// <summary>
/// Show Format Choose Dialog
/// </summary>
/// <param name="ownerWindowHandle">Owner window handle, can be null</param>
/// <param name="windowTitle">Window title</param>
/// <param name="enumFlags">Enumeration flags. None to get everything</param>
/// <param name="enumFormat">Enumeration format. Only needed with certain enumeration flags</param>
/// <param name="selectedFormat">The selected format</param>
/// <param name="selectedFormatDescription">Textual description of the selected format</param>
/// <param name="selectedFormatTagDescription">Textual description of the selected format tag</param>
/// <returns>True if a format was selected</returns>
public static bool ShowFormatChooseDialog(
IntPtr ownerWindowHandle,
string windowTitle,
AcmFormatEnumFlags enumFlags,
WaveFormat enumFormat,
out WaveFormat selectedFormat,
out string selectedFormatDescription,
out string selectedFormatTagDescription)
{
AcmFormatChoose formatChoose = new AcmFormatChoose();
formatChoose.structureSize = Marshal.SizeOf(formatChoose);
formatChoose.styleFlags = AcmFormatChooseStyleFlags.None;
formatChoose.ownerWindowHandle = ownerWindowHandle;
int maxFormatSize = 200; // guess
formatChoose.selectedWaveFormatPointer = Marshal.AllocHGlobal(maxFormatSize);
formatChoose.selectedWaveFormatByteSize = maxFormatSize;
formatChoose.title = windowTitle;
formatChoose.name = null;
formatChoose.formatEnumFlags = enumFlags;//AcmFormatEnumFlags.None;
formatChoose.waveFormatEnumPointer = IntPtr.Zero;
if (enumFormat != null)
{
IntPtr enumPointer = Marshal.AllocHGlobal(Marshal.SizeOf(enumFormat));
Marshal.StructureToPtr(enumFormat, enumPointer, false);
formatChoose.waveFormatEnumPointer = enumPointer;
}
formatChoose.instanceHandle = IntPtr.Zero;
formatChoose.templateName = null;
MmResult result = AcmInterop.acmFormatChoose(ref formatChoose);
selectedFormat = null;
selectedFormatDescription = null;
selectedFormatTagDescription = null;
if (result == MmResult.NoError)
{
selectedFormat = WaveFormat.MarshalFromPtr(formatChoose.selectedWaveFormatPointer);
selectedFormatDescription = formatChoose.formatDescription;
selectedFormatTagDescription = formatChoose.formatTagDescription;
}
Marshal.FreeHGlobal(formatChoose.waveFormatEnumPointer);
Marshal.FreeHGlobal(formatChoose.selectedWaveFormatPointer);
if (result != MmResult.AcmCancelled && result != MmResult.NoError)
{
throw new MmException(result, "acmFormatChoose");
}
return(result == MmResult.NoError);
}
public static extern MmResult acmFormatChoose(ref AcmFormatChoose formatChoose);