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CbName: TComboBox;
width: Integer;                  //ʵ¼ÊËùÐèµÄ¿í¶È
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width := CbName.Canvas.TextWidth(CbName.Items[I]); //¿ÉÓô˷½·¨Í¨¹ý±éÀú»ñµÃijѡÏîµÄ×î´ó¿í¶È£¬Ò²¿ÉÒÔ°´×Ô¼ºµÄÐèÒªÉ趨¿í¶È
SendMessage(CbName.Handle, CB_SETDROPPEDWIDTH, width, 0);


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procedure DoubleTheValue (var Value: Integer);
begin
Value := Value * 2;
end;
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var
X: Integer;
begin
X := 10;
DoubleTheValue (X);
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library dll1;
uses
  SysUtils,
  Classes;
{$R *.res}
Function mymax(x, y: Integer; out jj: Integer; out abc: PChar): Integer; stdcall;
begin
  jj := x * y;
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