Title: Displaying a form over another form with exact coordinates
Question: How to display a form over another form with exact coordinates?
Answer:
I want to display a form exactly at the bottom of the TButton aligned left.
procedure TForm1.Button1Click(Sender: TObject);
var
formTop,formLeft: Integer;
Ctrl: TControl;
DisplayForm: TForm;
begin
formTop := Top;
formLeft := Left;
try
DisplayForm := TForm.Create( Self );
ctrl := Button1;
repeat
formTop := formTop + ctrl.Top;
formLeft := formLeft + ctrl.Left;
ctrl := ctrl.Parent;
until ( ctrl is TForm );
//You can call the Windows API function GetSystemMetrics().
DisplayForm.Left := formLeft + 2 * GetSystemMetrics( SM_CXBORDER );
DisplayForm.Top := formTop + 2 * GetSystemMetrics( SM_CYBORDER ) +
Button1.Height + GetSystemMetrics( SM_CYCAPTION );
DisplayForm.ShowModal;
finally
DisplayForm.Free;
end;
end;