How to prevent a union field selecting window at the debug time?

[David_Lee]

Using the GetDiskFreeSpaceEx() API to get the disk free space volume at the debug time, it always popup such a window:

I'd like to know how the prevent the enquiry?

David

[RobertoBozzolo]

I suppose you receive this popup when you try to examine the variable in the variables window with Shift+F7, right?

If so, if you select the specific part of the union you want to see, you won't receive the popup. That is, supposing you have a variable

ULARGE_INTEGER    ds;

if you highlight for example ds.QuadPart you won't see the popup.