Thread: WriteProcessMemory() problem on Windows 7 64-bit - C programming

Code:

            BYTE bNewData[]={0x90,0x90,0x90,0x90,0x90,0x90,0x90};
            DWORD dwNewDataSize = sizeof(bNewData);


            if (WriteProcessMemory(hProcess, 0x0094f720, &bNewData, dwNewDataSize, NULL) == 0 ) 
            { 
                puts("Failure!"); printf( "Reason for failure : %s\n", strerror( GetLastError() ) ); 
            } else { 
                puts("Success!"); 
            }

When I execute that code on my computer, I get the error, " Reason for failure : No such device or address ". I do not get how to fix this error when I know the address I gave it is valid. Is the error because I don't typecast the address to LPVOID, or is it just my computer? Also, how can I fix it?

Never mind, I fixed it, I accidentally closed the process handle before changing the memory inside.