Управление Program Manager в Win95 с помощью DDE

unit Pm;

interface

uses
  SysUtils, Classes, DdeMan;

type
  EProgManError = class(Exception);

  TProgMan = class(TComponent)
  private
    FDdeClientConv: TDdeClientConv;
    procedure InitDDEConversation;
    function ExecMacroString(Macro: string): Boolean;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure CreateGroup(GroupName: string; ShowGroup: Boolean);
    procedure DeleteGroup(GroupName: string);
    procedure DeleteItem(ItemName: string);
    procedure AddItem(CmdLine, ItemName: string);
  end;

implementation

uses Utils;

const

  { DDE-макростроки для Program Manager }
  SDDECreateGroup = '[CreateGroup(%s)]';
  SDDEShowGroup = '[ShowGroup(%s, 1)]';
  SDDEDeleteGroup = '[DeleteGroup(%s)]';
  SDDEDeleteItem = '[DeleteItem(%s)]';
  SDDEAddItem = '[AddItem(%s, "%s", %s)]';

constructor TProgMan.Create(AOwner: TComponent);
begin

  inherited Create(AOwner);
  InitDDEConversation;
end;

destructor TProgMan.Destroy;
begin

  if Assigned(FDDEClientConv) then
    FDdeClientConv.CloseLink;
  inherited Destroy;
end;

function TProgMan.ExecMacroString(Macro: string): Boolean;
begin

  StringAsPchar(Macro);
  Result := FDdeClientConv.ExecuteMacro(@Macro[1], False);
end;

procedure TProgMan.InitDDEConversation;
begin

  FDdeClientConv := TDdeClientConv.Create(Self);
  if not FDdeClientConv.SetLink('PROGMAN', 'PROGMAN') then
    raise EProgManError.Create('Не могу установить DDE Link');
end;

procedure TProgMan.CreateGroup(GroupName: string; ShowGroup: Boolean);
begin

  { Удаляем группу, если она существует }
  ExecMacroString(Format(SDDEDeleteGroup, [GroupName]));

  if not ExecMacroString(Format(SDDECreateGroup, [GroupName])) then
    raise EProgManError.Create('Не могу создать группу ' + GroupName);
  if ShowGroup then
    if not ExecMacroString(Format(SDDEShowGroup, [GroupName])) then
      raise EProgManError.Create('Не могу показать группу ' + GroupName);
end;

procedure TProgMan.DeleteGroup(GroupName: string);
begin

  if not ExecMacroString(Format(SDDEDeleteGroup, [GroupName])) then
    raise EProgManError.Create('Не могу удалить группу ' + GroupName);
end;

procedure TProgMan.DeleteItem(ItemName: string);
begin

  if not ExecMacroString(Format(SDDEDeleteGroup, [ItemName])) then
    raise EProgManError.Create('Не могу удалить элемент ' + ItemName);
end;

procedure TProgMan.AddItem(CmdLine, ItemName: string);
var

  P: PChar;
  PSize: Word;
begin

  PSize := StrLen(SDDEAddItem) + (Length(CmdLine) * 2) + Length(ItemName) + 1;
  GetMem(P, PSize);
  try
    StrFmt(P, SDDEAddItem, [CmdLine, ItemName, CmdLine]);
    if not FDdeClientConv.ExecuteMacro(P, False) then
      raise EProgManError.Create('Не могу добавить элемент ' + ItemName);
  finally
    FreeMem(P, PSize);
  end;
end;

end.