private void ReadSharedMem_Click(object sender, EventArgs e)
{
IntPtr ptr;
try
{
ptr = Marshall.AllocHGlobal(Marshall.SizeOf(typeof(SYSTEM_OUTPUT)));
int ret = getStatus(ptr);
if (ret == 0)
{
output = (SYSTEM_OUTPUT)Marshal.PtrToStructure(ptr, typeof(SYSTEM_OUTPUT));
}
//do something with output
label1.Text = ret;
}
catch (AccessViolationException ave)
{
label1.Text = ave.Message;
}
finally
{
Marshal.FreeHGlobal(ptr); //make sure to free the memory
}
}