Question on Marshal of a unsigned short

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G

Guest

I need to call into a C++ DLL from my C# code.
The function is expecting a void pointer to an unsigned short.
Which would be more correct?

UInt16 wRegData;


IntPtr p = Marshal.AllocHGlobal(Marshal.SizeOf(wRegData));
Marshal.StructureToPtr(wRegData, p, false);

or

IntPtr p = Marshal.AllocHGlobal(Marshal.SizeOf(wRegData));
Marshal.WriteInt16(p, (short) wRegData);


Thank you.
 
scottt said:
I need to call into a C++ DLL from my C# code.
The function is expecting a void pointer to an unsigned short.
Which would be more correct?

UInt16 wRegData;


IntPtr p = Marshal.AllocHGlobal(Marshal.SizeOf(wRegData));
Marshal.StructureToPtr(wRegData, p, false);

or

IntPtr p = Marshal.AllocHGlobal(Marshal.SizeOf(wRegData));
Marshal.WriteInt16(p, (short) wRegData);


Thank you.
Click to expand...

ushort wRegData= 123;

fncExpectingPointerToUInt(ref wRegData);

Willy.
 

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