globalmemorystatusu.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 GlobalMemoryStatusU;

interface

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

type
  TGlobalMemoryStatusForm = class(TForm)
    Panel1: TPanel;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    ButtonGlobalMemoryStatus: TButton;
    Label7: TLabel;
    Label8: TLabel;
    Label9: TLabel;
    procedure ButtonGlobalMemoryStatusClick(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  GlobalMemoryStatusForm: TGlobalMemoryStatusForm;

implementation

{$R *.DFM}

procedure TGlobalMemoryStatusForm.ButtonGlobalMemoryStatusClick(
  Sender: TObject);
var
  GlobalMemoryInfo : TMemoryStatus;  // holds the global memory status information
begin
  {set the size of the structure before the call.}
  GlobalMemoryInfo.dwLength := SizeOf(GlobalMemoryInfo);

  {retrieve the global memory status...}
  GlobalMemoryStatus(GlobalMemoryInfo);

  {and display the information}
  Label1.caption := 'Results of GlobalMemoryStatus:';
  Label2.caption := 'Record structure size: '+IntToStr(
                     GlobalMemoryInfo.dwLength)+' bytes';
  Label3.caption := 'Current memory load: '+IntToStr(
                     GlobalMemoryInfo.dwMemoryLoad)+'%';
  Label4.caption := 'Total physical memory: '+Format('%.0n',[
                     GlobalMemoryInfo.dwTotalPhys/1])+' bytes';
  Label5.caption := 'Total available physical memory: '+Format('%.0n',[
                     GlobalMemoryInfo.dwAvailPhys/1])+' bytes';
  Label6.caption := 'Total paging file size: '+Format('%.0n',[
                     GlobalMemoryInfo.dwTotalPageFile/1])+' bytes';
  Label7.Caption := 'Total available paging file memory: '+Format('%.0n',[
                     GlobalMemoryInfo.dwAvailPageFile/1])+' bytes';
  Label8.caption := 'Total virtual memory: '+Format('%.0n',[
                     GlobalMemoryInfo.dwTotalVirtual/1])+' bytes';
  Label9.caption := 'Total available virtual memory: '+Format('%.0n',[
                     GlobalMemoryInfo.dwAvailVirtual/1])+' bytes';
end;

end.