WinAPI 字符及字符串函数(5): IsCharAlpha - 是否是个字母

unit Unit1;



interface



uses

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

  Dialogs, StdCtrls;



type

  TForm1 = class(TForm)

    Button1: TButton;

    Button2: TButton;

    Button3: TButton;

    Button4: TButton;

    Button5: TButton;

    procedure Button1Click(Sender: TObject);

    procedure Button2Click(Sender: TObject);

    procedure Button3Click(Sender: TObject);

    procedure Button4Click(Sender: TObject);

    procedure Button5Click(Sender: TObject);

  end;



var

  Form1: TForm1;



implementation



{$R *.dfm}



procedure TForm1.Button1Click(Sender: TObject);

var

  c: Char;

  b: BOOL;

begin

  c := #65; {A}

  b := IsCharAlpha(c);

  ShowMessage(BoolToStr(b, True)); {True}

end;



procedure TForm1.Button2Click(Sender: TObject);

var

  c: Char;

  b: BOOL;

begin

  c := #97; {a}

  b := IsCharAlpha(c);

  ShowMessage(BoolToStr(b, True)); {True}

end;



procedure TForm1.Button3Click(Sender: TObject);

var

  c: Char;

  b: BOOL;

begin

  c := #48; {0}

  b := IsCharAlpha(c);

  ShowMessage(BoolToStr(b, True)); {False}

end;



procedure TForm1.Button4Click(Sender: TObject);

var

  c: Char;

  b: BOOL;

begin

  c := #13; {回车键}

  b := IsCharAlpha(c);

  ShowMessage(BoolToStr(b, True)); {False}

end;



procedure TForm1.Button5Click(Sender: TObject);

var

  c: WideChar;

  b: BOOL;

begin

  c := #19975; {万}

  b := IsCharAlpha(c);

  ShowMessage(BoolToStr(b, True)); {False}

end;



end.