[Lazarus] MainForm

Anthony Walter sysrpl at gmail.com
Wed Mar 4 13:03:29 CET 2015

Is there some reason, other than for Delphi compatibility, that the
MainForm of an application must descend from TForm, rather than allowing
other TCustomForm derived forms?

I was writing some custom form modules and was surprised that they cannot
be made at the first form in an application.

Also I thought I submitted a patch for this a year ago, but
TCustomForm.PaintWindow still prevents a form from doing any painting while
in design mode. The simple fix is:

    if Designer <> nil then Designer.PaintGrid;

Rather than as it is now:

    if Designer <> nil then Designer.PaintGrid else Paint;
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