TListBox keep subform inside win-TRECT of MainForm.exe?

[d2010]

I have one application in Delphi7 on win32.
I create inside "Lazarus4.0" the flistsvc.dll as DelphiMode
I have one example I winrar5 can create "subForm" inside "mainForm.exe not .dll"
C:Q1=How to create&set subForm4Lazarus inside
windowDelphi7mainForm.exe?
{--}
You got subForm4Lazarus from flistsvc.dll
Today I created the "subForm4Lazarus" but is outside of TRECT.
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I compile flistsvc.lpr is work good, but but the source-pascal is old style-code.
When winrar5subform is outside TRECT, then
winrar5exe show only half of winrar5subform or 10%, 20%, 30%,  50%, ... 80% * TRECT.

Code: [Select]

C:Q1=Can i make same effect of Trect? (see *.idx0001.jpg)
I attach full source of *.lpr, *.lpi compiled inside zip
- OR  -
C:Q2= How set "subForm4Lazarus".dll as MDI-win-handle?(easy question)