Help converting WinAPI struct

[MuZZy]

HI,

I would really appreciate some hwlp with this:
Here is the WinAPI struct used in call to winapi function wavInGetDevCaps:

typedef struct
{
WORD wMid;
WORD wPid;
MMVERSION vDriverVersion;
TCHAR szPname[MAXPNAMELEN];
DWORD dwFormats;
WORD wChannels;
WORD wReserved1;
} WAVEINCAPS
I need to convert it into c# struct:

[StructLayout(LayoutKind.Sequential)] public struct WAVEINCAPS
{
Int16 wMid;
Int16 wPid;
int vDriverVersion;
public char[] szPname;
int dwFormats;
Int16 wChannels;
Int16 wReserved;
}
Well, first i'm not sure i need to use this attribute,
second, i don't know how to set size of szPname in declaration (seems
like it's not the way c# operates with arrays)
Any ideas on thaat?

Thank you in advance,
Andrey

[Mattias Sjögren]

Well, first i'm not sure i need to use this attribute,
The StructLayout attribute? You should probably keep it here, and add

CharSet=CharSet.Auto

to it.

second, i don't know how to set size of szPname in declaration (seems
like it's not the way c# operates with arrays)

[MarshalAs(UnmanagedType.ByValArray, SizeConst=MAXPNAMELEN)]
public char[] szPname;

or

[MarshalAs(UnmanagedType.ByValTStr, SizeConst=MAXPNAMELEN)]
public string szPname;

Mattias

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Mattias Sjögren [MVP] mattias @ mvps.org
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