How do I save the coordinates of windows

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VC++

I am using VC++ using MFC

There are 4 related functions to get the coordinates of form, dialog, control...

1. GetWindowRect(rect);
2. ScreenToClient(rect);
3. GetClientRect(rect);
4. ClientToScreen(rect);

Each of 1,2,3,4 have 4 coordinates like as rect.left, rect.top, rect.right, rect.bottom

I want to restore listctrl window (or any windows) when user click the sw_restore button.

Questions:
1. First I save the 4 coordinates of one of above 4 cases.
2. When in the event of OnSize() that is type = SIZE_RESTORED
MoveWindow(a,b,c,d);

What is a = ?, b =?, c=?, d=?

Thank you.

What I have tried:

More than 10 days wasted for this problems.