getcharwidthsu.pas

DelphiWin32核心API参考光盘内容.是学习书籍中的源码,便于学习.

unit GetCharWidthsU;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls, Grids;

type
  TForm1 = class(TForm)
    StringGrid1: TStringGrid;
    Label1: TLabel;
    procedure FormActivate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.FormActivate(Sender: TObject);
var
  CharWidths: array[0..25] of Integer;    // holds the character widths
  Count: Integer;                         // general loop control variable
begin
  {initialize the string grid}
  StringGrid1.Cells[0,0] := 'Character';
  StringGrid1.Cells[1,0] := 'Width';

  {retrieve the widths of all uppercase letters}
  GetCharWidth(Form1.Canvas.Handle, Ord('A'), Ord('Z'), CharWidths);

  {display the character widths}
  for Count := 0 to 26 do
  begin
    StringGrid1.Cells[0, Count+1] := Char(Ord('A')+Count);
    StringGrid1.Cells[1, Count+1] := IntToStr(CharWidths[Count]);
  end;
end;



end.