Hi,
Iam trying to implement the QueryStatus method of IOleCommandTarget
interface.
public int QueryStatus(ref Guid pguidCmdGroup, int cCmds, IntPtr
prgCmds, IntPtr pCmdText)
{
object ocmd=Marshal.PtrToStructure(prgCmds,typeof(OLECMD));

}
Basically, prgCmds is a pointer to an existing OLECMD structure, and I
want to fill in that structure. I tried to use Marshal.PtrToStructure
to obtain the structure. But it returns an object.The structure
definition of OLECMD is as follows:
[StructLayout(LayoutKind.Sequential)]
public struct OLECMD
{
public UInt32 cmdID;
public UInt64 cmdf;
}
I want to set the value of cmdf. How to do it?Please somebody help me
in this regard.

Thanks in advance,
Sujoan.

Sujoan,

Please don't multipost to different groups.


>public int QueryStatus(ref Guid pguidCmdGroup, int cCmds, IntPtr
>prgCmds, IntPtr pCmdText)

It would be easier if you changed the signature to

public int QueryStatus(ref Guid pguidCmdGroup, int cCmds, [In, Out]
ref OLECMD prgCmds, IntPtr pCmdText)


>I want to set the value of cmdf. How to do it?

OLECMD ocmd = Marshal.PtrToStructure(prgCmds,typeof(OLECMD));
ocmd.cmdf = 42;
Marshal.StructureToPtr(ocmd, prgCmds, false);


Mattias

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Mattias Sjögren [C# MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
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