Получить заголовки и названия классов форм активных процессов

Автор: Xavier Pacheco

{
Copyright © 1999 by Delphi 5 Developer's Guide - Xavier Pacheco and Steve Teixeira
}
unit MainFrm;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls,
Forms, Dialogs, StdCtrls, ComCtrls;
type
{ Define a record/class to hold the window name and class name for
each window. Instances of this class will get added to ListBox1 }
TWindowInfo = class
WindowName, // The window name
WindowClass: string; // The window's class name
end;
TMainForm = class(TForm)
lbWinInfo: TListBox;
btnGetWinInfo: TButton;
hdWinInfo: THeaderControl;
procedure btnGetWinInfoClick(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure lbWinInfoDrawItem(Control: TWinControl; Index: Integer;
Rect: TRect; State: TOwnerDrawState);
procedure hdWinInfoSectionResize(HeaderControl: THeaderControl;
Section: THeaderSection);
end;
var
MainForm: TMainForm;
implementation
{$R *.DFM}
function EnumWindowsProc(Hw: HWnd; AMainForm: TMainForm): Boolean; stdcall;
{ This procedure is called by the User32.DLL library as it enumerates
through windows active in the system. }
var
WinName, CName: array[0..144] of char;
WindowInfo: TWindowInfo;
begin
{ Return true by default which indicates not to stop enumerating
through the windows }
Result := True;
GetWindowText(Hw, WinName, 144); // Obtain the current window text
GetClassName(Hw, CName, 144); // Obtain the class name of the window
{ Create a TWindowInfo instance and set its fields with the values of
the window name and window class name. Then add this object to
ListBox1's Objects array. These values will be displayed later by
the listbox }
WindowInfo := TWindowInfo.Create;
with WindowInfo do
begin
SetLength(WindowName, strlen(WinName));
SetLength(WindowClass, StrLen(CName));
WindowName := StrPas(WinName);
WindowClass := StrPas(CName);
end;
MainForm.lbWinInfo.Items.AddObject('', WindowInfo); // Add to Objects array
end;
procedure TMainForm.btnGetWinInfoClick(Sender: TObject);
begin
{ Enumerate through all top-level windows being displayed. Pass in the
call back function EnumWindowsProc which will be called for each
window }
EnumWindows(@EnumWindowsProc, 0);
end;
procedure TMainForm.FormDestroy(Sender: TObject);
var
i: integer;
begin
{ Free all instances of TWindowInfo }
for i := 0 to lbWinInfo.Items.Count - 1 do
TWindowInfo(lbWinInfo.Items.Objects[i]).Free
end;
procedure TMainForm.lbWinInfoDrawItem(Control: TWinControl; Index: Integer;
Rect: TRect; State: TOwnerDrawState);
begin
{ First, clear the rectangle to which drawing will be performed }
lbWinInfo.Canvas.FillRect(Rect);
{ Now draw the strings of the TWindowInfo record stored at the
Index'th position of the listbox. The sections of HeaderControl1
will give positions to which to draw each string }
with TWindowInfo(lbWinInfo.Items.Objects[Index]) do
begin
DrawText(lbWinInfo.Canvas.Handle, PChar(WindowName),
Length(WindowName), Rect, dt_Left or dt_VCenter);
{ Shift the drawing rectangle over by using the size
HeaderControl1's sections to determine where to draw the next
string }
Rect.Left := Rect.Left + hdWinInfo.Sections[0].Width;
DrawText(lbWinInfo.Canvas.Handle, PChar(WindowClass),
Length(WindowClass), Rect, dt_Left or dt_VCenter);
end;
end;
procedure TMainForm.hdWinInfoSectionResize(HeaderControl:
THeaderControl; Section: THeaderSection);
begin
lbWinInfo.Invalidate; // Force ListBox1 to redraw itself.
end;
end.

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