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procedure TDragForm.ListDragOver(Sender, Source: TObject; X, Y: Integer;
State: TDragState; var Accept: Boolean);
begin
Accept := True;
if (Source = Edit1) and
((Sender as TCustomListBox).Items.IndexOf (Edit1.Text) >= 0) then
Accept := False;
end
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Delphi(Pascal) code:
library HealthDocDll;
uses
SysUtils,
Classes,
Forms,
Dialogs,
Windows,
HealthDoc in 'HealthDoc.pas' {frmHealthDoc},
pub in 'pub.pas';
{$R *.res}
proced ......