SetWindowPos in CDialog

[Laurio]

I have a modeless CDialog and im using WM_SIZING and overriding OnSizing(UINT, LPRECT) and SetWindowPos to resize it.
On my dialog there are about 20 buttons, which are also resized, using SetWindowPos. The problem im having is that i need to keep a gap between all controls. The controls are lined in 5 rows,
with a gap between all controls( ie above, to the sides and below). If i resize the controls, they overlap each other therefore removing all gaps.
Basically, how can i position the buttons once resized, to avoid overlapping?
Any help appreciated!

code so far:

void CMyDlg::OnSizing(UINT nSide, LPRECT lpRect)
{
CDialog::OnSize(nSide, lpRect)
CRect rect(lpRect);
GetClientRect(lpRect);

//Loop through all controls on the dialog - id's are in consequetive order
for (int i = IDC_CONTROL1; i < IDC_CONTROL20; i++)
{
CWnd* aWnd = GetDlgItem(i);
aWnd->SetWindowPos(NULL,0,0,rect.Width()/10, rect.Height()/10, SWP_NOMOVE);
}

}

[Mike Harnad]

Have you thought about enforcing a minimum size for the dialog? One that would prevent the buttons from overlapping?

[Laurio]

How will this help? i simply need to maintain a gap around all controls

[VladimirF]

How will this help? i simply need to maintain a gap around all controls

You need to both resize AND reposition controls.

[Laurio]

If i set a min size rect, how do i go about repositioning the controls then? this is what i need help with!

[VictorN]

... code so far:[/CODE]
void CMyDlg::OnSizing(UINT nSide, LPRECT lpRect)
{
CDialog::OnSize(nSide, lpRect)
CRect rect(lpRect);
GetClientRect(lpRect);

}[CODE]

if it is your actual code then it is wrong!
You should not call [B]CDialog::OnSize from CMyDlg::OnSizing handler !

Now about your "resizing" problem. As Mike and Vladimir mentuioned you probably need to handle WM_GETMINMAXINFO message to set the minimal possible size of the dialog window to prevent the child control overlap.
A ggod start coulb be checking out some article about this problem in www.codeguru.com / www.codeproject.com, for example:
ResizableLib
http://www.codeproject.com/dialog/#Control+Positioning
EasySize - Dialog resizing in no time!