[C#] PtrToStructure problem
Hi
First of all please let me know if there is some other, more suitable
group for this news - TIA :-)
Now, my problem. I'm writing an C# application in which I'm using some
functions from DLL. This dll has been written in C.
One of these functions returns as a result a structure, in example:
[StructLayout(LayoutKind.Sequential, Pack=2)]
internal class myStruct
{
public short someNumber;
public IntPtr handle;
}
OK. Now in this handle there is a pointer to a structure with actuall
results.
[StructLayout(LayoutKind.Sequential, Pack=2)]
internal class myStruct2
{
public uint count; //number of values return from function
public uint current; //current value
[MarshalAs(UnmanagedType.ByValArray, SizeConst=1)]
public short[] items; //array of results
}
OK. Hope you're still with me :D
Now, as you can see there is another array in myStruct2. This array
contains result which I want to get :D
In this function description I have something like this:
<description>
The items value is simply a placeholder for the start of the actual
array, which must be allocated when the container is allocated.
</description>
In my application I have something like this:
<code>
[DllImport("some.dll", EntryPoint="#1")]
private static extern short getValues([In, Out] myStruct cap);
myStruct ms = new myStruct();
getValues(ms);
myStruct2 ms2 = new myStruct2();
ms2 = (myStruct2)Marshal.PtrToStructure(ms.handle, typeof(myStruct2));
</code>
In return I get some really strange values in ms2.count and ms2.current.
Not mentioning that I can't get the values from the items :-(
What am I doing wrong? Meybe there is something missing?
best regards
Mateusz [PEYN] Adamus
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