0xC0000005: Access violation at location 0x00000000f41b1a6e on calling SetWindowPos

I am migrating my WIN32 application to WIN64 application. I have compiled the code for x64 platform. While running this application in debug mode I am getting the error message as
"First-chance exception at 0xf41b1a6e in xxx.exe: 0xC0000005: Access violation at location 0x00000000f41b1a6e."
This exception occurs when I execute below code.
SetWindowPos (lpI->hTop, NULL, 0, 0, cx, cy, SWP_NOZORDER | SWP_NOACTIVATE);

Please help me to resolve this issue.

Thanks
Sayaji

I wonder, what kind of help could be provided here. Do you really need an advice like this: Press Retry button and inspect the structure behind lpI pointer? And then understand from the other code who and when puts there the problem value? ;)

Quote:

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Originally Posted by sayajirao

Please help me to resolve this issue.

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As Igor mentioned, why not debug the application?

How do we (or you) know if lpI is pointing to a valid window? We don't know, but you should know by debugging your application and seeing what's there.

Regards,

Paul McKenzie

Are you sure that "lpI->hTop" doesn't need to point to 0x00000000f41b1a6f? :D
Now seriously, what lpI->hTop is supposed to be?