pinvoke.net: Edit: winmm.midiOutPrepareHeader

@msdn=https://docs.microsoft.com/en-us/previous-versions/ms711634(v%3dvs.85)
@pinvoke=http://pinvoke.net/midiOutPrepareHeader.htm

Summary: The midiOutPrepareHeader function prepares a MIDI system-exclusive or stream buffer for output. - LD83

!!!!C# Signature:
 [DllImport("winmm.dll", SetLastError=true)]
 static extern UInt32 midiOutPrepareHeader(IntPtr hMidiOut, IntPtr lpMidiOutHdr, UInt32 cbMidiOutHdr); // LD83
!!!!VB Signature:
 Declare Function midiOutPrepareHeader Lib "winmm.dll" (hMidiOut AS Intptr, lpMidiOutHdr AS IntPtr, cbMidiOutHdr) AS UInt32 ' LD83
!!!!User-Defined Types:
hMidiOut - Handle to the MIDI output device. This parameter can also be the handle of a MIDI stream cast to HMIDIOUT.
lpMidiOutHdr - Pointer to a [MIDIHDR] structure that identifies the buffer to be prepared.
cbMidiOutHdr - Size, in bytes, of the [MIDIHDR] structure.

!!!Returns
Returns [MMRESULT]. Possible values are:
MMSYSERR_NOERROR - Successful
MMSYSERR_INVALHANDLE - The specified device handle is invalid.
MMSYSERR_INVALPARAM - The specified address is invalid or the given stream buffer is greater than 64K.
MMSYSERR_NOMEM - The system is unable to allocate or lock memory.

!!!!Alternative Managed API:
Do you know one?  Please contribute it!

!!!!Notes:
None.

!!!!Tips & Tricks:
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!!!!Sample Code:
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Documentation: midiOutPrepareHeader@msdn on MSDN