Marshalling a variable from int to struct in 64X.

[VisithraVenkatesan]

Hi All,

When my application is running on x86 the program works fine. When I run it on x64, the Access Violation exception occurs. Exception details mentioned below.

"System.AccessViolationException: 'Attempted to read or write protected memory. This is often an indication that other memory is corrupt.'"

I thought that the problem lies in Marshalling. Do I have to manually Marshal the structure? Need help on this. I would prefer to have the same struct for both x64 and x86.

Example here:

My native method is defined like below.

internal struct CWPSTRUCT
{
internal IntPtr lParam;
internal IntPtr wParam;
internal int message;
internal IntPtr hwnd;
}

Main Code:

int lParam;

CWPSTRUCT cwp = (CWPSTRUCT)Marshal.PtrToStructure(lParam, typeof(CWPSTRUCT));

Regards

Visithra Venkatesan

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