Dual monitor issue

[[email protected]]

I have a Windows application in Delphi 5.

I have two monitors. When my application runs, the parent is displayed on the first monitor. When I move the parent window to the second monitor and click a button, this child window stays on the first monitor. Is there a way to make the child window stay with the parent window no matter where the parent window is located? I searched related to this but solution is in C# not in Delphi, I am very new in Delphi. Child forms are creating at run time.

My Code is:

function BeforeCreateForm(Session:ISmSession;var IsDLL: Boolean):HWND;
var
  SmGUIServices: ISmGUIServices;
  MainWindowHandle:HWND;
begin
  MainWindowHandle:=0;
  IsDLL := false;
  if (Application.Handle = 0) and (Session <> nil) then
  begin
    IsDLL := true;
    SmGUIServices := (Session.Services.Item[TDM_SmarTeamServices[srvSmGUIService]] as ISmGUIServices);
    if SmGUIServices <> nil then
    {$IFNDEF BUILTPACKAGE}
       MainWindowHandle:=ForceIntegerToHwnd(SmGUIServices.MainWindowHandle);
    {$ENDIF}
  end;
  result:=MainWindowHandle;
end { of BeforeCreateForm } ;

procedure TSmForm.AfterCreateForm(Session:ISmSession; SmHelpContext:TDM_Int32; IsDLL: boolean);
begin

  if SmSession<>Session then
    SmSession:= Session;
  if SmHelpContext > 0 then
    HelpContext:=SmHelpContext;

  if (IsDLL) then
  begin
    if (Icon.Empty) and (ParentHWND <> 0) then
      SendMessage(Handle, WM_SETICON, 1, SendMessage(ParentHWND, WM_GETICON, 1, 0));
  end;
end { of TSmForm.AfterCreateForm } ;


constructor TSmForm.Create(AOwner: TComponent;Session:ISmSession;SmHelpContext:TDM_Int32);
var
  IsDLL: Boolean;
begin
  ParentHWND:=BeforeCreateForm(Session, IsDLL);
  HelpContext := 0;
  SmSession:= Session;
  inherited Create(AOwner);
  AfterCreateForm(Session,SmHelpContext, IsDLL);
end;



procedure TSmForm.CreateParams(var Params: TCreateParams);

var
  SmGuiServices: ISmGuiServices;
  MDIChild : TIMDIChildForm;
  MultiTabType :TDM_Int16;
  I:Integer;

begin
  inherited CreateParams(Params);
  if ParentHWND <> 0 then
  begin
     Params.WndParent:=ParentHWND;

    SmGUIServices := (SmSession.Services.Item[TDM_SmarTeamServices[srvSmGUIService]] as ISmGUIServices);
    for I := SmGUIServices.SmViewWindows.Count - 1 downto 0 do
    begin
      if(SmGUIServices.SmViewWindows.item[I].SmView<>nil) then  
      if(SmGUIServices.SmViewWindows.item[I].SmView.ViewType <> vwtBomView) then       
      begin                                                                            
      MDIChild := TIMDIChildForm((SmGUIServices.SmViewWindows.item[I] as ISmRawViewWindow).SmViewWindowHandle);

      MultiTabType:=GetMultiTabType( MDIChild.tabSmView, MDIChild.tabSmView.ActivePage.PageIndex);

        if UpperCase(SmSession.ApplicationName) = 'MYAPP' then
        (MDIChild.MDIViewer.ViewerType = 10))) then  

        begin

         // Params.ExStyle := Params.ExStyle or WS_EX_TOPMOST;
          Params.ExStyle := Params.ExStyle or WS_EX_APPWINDOW;
         Params.WndParent := GetDesktopWindow;


          exit;
        end

        else
        begin
          if (MultiTabType = MT_Viewer) then
          begin
            Params.ExStyle := Params.ExStyle or WS_EX_TOPMOST;
            exit;
          end;
        end;

      end;                  
    end;   
  end;
end;