Delphi調用WinAPI 字符及字符串函數(5): IsCharAlpha - 是否是個字母

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; {回車鍵}
　b := IsCharAlpha(c);
　ShowMessage(BoolToStr(b, True)); {False}
end;

procedure TForm1.Button5Click(Sender: TObject);

var
　c: WideChar;
　b: BOOL;
begin
　c := #19975; {萬}
　b := IsCharAlpha(c);
　ShowMessage(BoolToStr(b, True)); {False}
end;