Get coordinates of child control relative to parent

[Leto]

Hi Guys

There're only two API calls to get a Windows coordinates (and a few others
which return both of these at once).

One is GetClientRect which returns the window extent (0,0-width, height) and
the other is GetWindowRect which returns (left, top-right, bottom).

My problem is I need to reposition controls on a dialog and neither of these
provide the child control coordinates relative to the parent window.

I have tried GetWindowRect for both parent and child and subtracting.
Unfortunately this seems to include the border and stuff. Is there a
border/window style indepenent way of getting a child controls coordinates
relative to the parent.

MoveWindow usually accepts screen coords unless it's a child window, in
which case it'll only accept client coordinates (which appear to be relative
to the client area of the parent, i.e. excluding borders).

Cheers
Leto

[David Lowndes]

>There're only two API calls to get a Windows coordinates (and a few others
>which return both of these at once).
>
>One is GetClientRect which returns the window extent (0,0-width, height) and
>the other is GetWindowRect which returns (left, top-right, bottom).
>
>My problem is I need to reposition controls on a dialog and neither of these
>provide the child control coordinates relative to the parent window.
>
>I have tried GetWindowRect for both parent and child and subtracting.

ClienToScreen & ScreenToClient are probably the missing links (APIs)
you need.

Dave

[Remy Lebeau]

"David Lowndes" <Dav...@example.invalid> wrote in message
news:j47il4931or1pn4sb...@4ax.com...

> ClienToScreen & ScreenToClient are probably the missing links
> (APIs) you need.

Alternatively, you can use MapWindowPoints() instead, ie:

RECT r = {0};
::GetClientRect(hWnd, &r);
::MapWindowPoints(hWnd, ::GetParent(hWnd), (LPPOINT) &r, 2);

--
Remy Lebeau

[Leto]

Thanks guys. That's worked a treat.

"Remy Lebeau" <no....@no.spam.com> wrote in message
news:eHZLkhha...@TK2MSFTNGP03.phx.gbl...