WinAPI: GetModuleFileName、GetModuleHandle

unit Unit1;



interface



uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs, StdCtrls;



type

  TForm1 = class(TForm)

    Button1: TButton;

    procedure FormCreate(Sender: TObject);

    procedure Button1Click(Sender: TObject);

  end;



var

  Form1: TForm1;



implementation



{$R *.dfm}



procedure TForm1.FormCreate(Sender: TObject);

var

  buf: array[0..MAX_PATH] of Char;

  hinst: HMODULE;

begin

  {获取指定模块的句柄}

  hinst := GetModuleHandle('gdi32.dll');



  {获取模块的路径}

  GetModuleFileName(hinst, buf, Length(buf));

  ShowMessage(buf); {C:\WINDOWS\system32\GDI32.dll}

end;



procedure TForm1.Button1Click(Sender: TObject);

var

  buf: array[0..MAX_PATH] of Char;

begin

  {当 GetModuleFileName 的第一个参数为 0 或 HInstance 时, 会获取当前模块路径}

  GetModuleFileName(0, buf, Length(buf));

  ShowMessage(buf);



  GetModuleFileName(HInstance, buf, Length(buf));

  ShowMessage(buf);



  {获取当前程序路径的常用方法}

  ShowMessage(Application.ExeName);

  ShowMessage(ParamStr(0));

end;



end.