WinAPI 字符及字符串函数(7): IsCharLower - 是否是个小写字母
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 := IsCharLower(c);
ShowMessage(BoolToStr(b, True)); {False}
end;

procedure TForm1.Button2Click(Sender: TObject);
var
c: Char;
b: BOOL;
begin
c := #97; {a}
b := IsCharLower(c);
ShowMessage(BoolToStr(b, True)); {True}
end;

procedure TForm1.Button3Click(Sender: TObject);
var
c: Char;
b: BOOL;
begin
c := #48; {0}
b := IsCharLower(c);
ShowMessage(BoolToStr(b, True)); {False}
end;

procedure TForm1.Button4Click(Sender: TObject);
var
c: Char;
b: BOOL;
begin
c := #13; {回车键}
b := IsCharLower(c);
ShowMessage(BoolToStr(b, True)); {False}
end;

procedure TForm1.Button5Click(Sender: TObject);
var
c: WideChar;
b: BOOL;
begin
c := #19975; {万}
b := IsCharLower(c);
ShowMessage(BoolToStr(b, True)); {False}
end;

end.