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UfrmGUIInfo.pas
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UfrmGUIInfo.pas
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unit UfrmGUIInfo;
interface
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.ExtCtrls, Vcl.StdCtrls, Vcl.Buttons;
type
TGUIThreadInfoForm = class(TForm)
lblFocus: TLabel;
lblActive: TLabel;
tmrUpdateLabels: TTimer;
lblCapture: TLabel;
lblFocusHandle: TLabel;
lblActiveHandle: TLabel;
lblCaptureHandle: TLabel;
lblFocusClass: TLabel;
lblActiveClass: TLabel;
lblCaptureClass: TLabel;
lblThread: TLabel;
lblThreadName: TLabel;
lblForeground: TLabel;
lblForegroundHandle: TLabel;
lblForegroundClass: TLabel;
lblThreadHandle: TLabel;
lblStatus: TLabel;
procedure tmrUpdateLabelsTimer(Sender: TObject);
procedure lblForegroundMouseEnter(Sender: TObject);
procedure lblMouseLeave(Sender: TObject);
procedure lblActiveMouseEnter(Sender: TObject);
procedure lblFocusMouseEnter(Sender: TObject);
procedure lblCaptureMouseEnter(Sender: TObject);
procedure FormCreate(Sender: TObject);
private
FForegroundWindow: THandle;
fgti: TGUIThreadInfo;
FProcessName: string;
FForegroundThreadID: Cardinal;
FHighlightedWindow: THandle;
FHighlightRect: TRect;
FHighlightedLabel: TLabel;
procedure UpdateStatus;
procedure HighlightWindow(Sender: TObject; AHandle: THandle);
procedure ClearHighlight;
procedure DrawHighlightRect;
procedure SetWindowInfo(ANewHandle, AOldHandle: THandle; lblHandle,
lblClass: TLabel);
function ReduceToBlack(c: TColor): TColor;
procedure WMUser(var Message: TMessage); message WM_USER;
end;
var
GUIThreadInfoForm: TGUIThreadInfoForm;
implementation
uses
System.Math,
Winapi.psapi;
{$R *.dfm}
procedure TGUIThreadInfoForm.HighlightWindow(Sender: TObject; AHandle: THandle);
var
r: TRect;
begin
ClearHighlight;
if AHandle > 0 then
begin
FHighlightedLabel := Sender as TLabel;
FHighlightedLabel.Font.Color := clRed;
FHighlightedWindow := AHandle;
if GetWindowRect(AHandle, r) then
begin
FHighlightRect := r;
DrawHighlightRect;
end;
end;
end;
procedure TGUIThreadInfoForm.DrawHighlightRect;
var
lb: TLogBrush;
dc: HDC;
oldpen, pen: HPEN;
oldrop: Integer;
r: TRect;
begin
if (FHighlightRect.Left = 0) and (FHighlightRect.Right = 0) then
Exit;
r := FHighlightRect;
r.Left := Max(2, r.Left);
r.Top := Max(2, r.Top);
r.Right := Min(Screen.Width - 2, r.Right);
r.Bottom := Min(Screen.Height - 2, r.Bottom);
dc := GetDC(0);
try
FillChar(lb, sizeof(TLogBrush), 0);
pen := CreatePen(PS_SOLID, 5, RGB($FF,0,0)); // PS_GEOMETRIC, 4, lb, 0, nil);
oldpen := SelectObject(dc, pen);
oldrop := SetROP2(dc, R2_XORPEN);
SelectObject(dc, GetStockObject(NULL_BRUSH));
Rectangle(dc, r.Left, r.Top, r.Right, r.Bottom);
SetROP2(dc, oldrop);
SelectObject(dc, oldpen);
finally
ReleaseDC(0, dc);
end;
end;
procedure TGUIThreadInfoForm.FormCreate(Sender: TObject);
begin
fgti.hwndActive := MAXINT;
fgti.hwndFocus := MAXINT;
fgti.hwndCapture := MAXINT;
FForegroundThreadID := MAXINT;
FForegroundWindow := MAXINT;
PostMessage(Handle, WM_USER, 0, 0);
end;
procedure TGUIThreadInfoForm.WMUser(var Message: TMessage);
begin
ShowWindow(Handle, SW_SHOWNOACTIVATE);
Visible := True;
end;
procedure TGUIThreadInfoForm.ClearHighlight;
begin
if Assigned(FHighlightedLabel) then
FHighlightedLabel.Font.Color := clBlack;
DrawHighlightRect;
FHighlightedLabel := nil;
FillChar(FHighlightRect, Sizeof(TRect), 0);
end;
procedure TGUIThreadInfoForm.lblActiveMouseEnter(Sender: TObject);
begin
HighlightWindow(Sender, fgti.hwndActive);
end;
procedure TGUIThreadInfoForm.lblCaptureMouseEnter(Sender: TObject);
begin
HighlightWindow(Sender, fgti.hwndCapture);
end;
procedure TGUIThreadInfoForm.lblFocusMouseEnter(Sender: TObject);
begin
HighlightWindow(Sender, fgti.hwndFocus);
end;
procedure TGUIThreadInfoForm.lblForegroundMouseEnter(Sender: TObject);
begin
HighlightWindow(Sender, FForegroundWindow);
end;
procedure TGUIThreadInfoForm.lblMouseLeave(Sender: TObject);
begin
ClearHighlight;
end;
procedure TGUIThreadInfoForm.tmrUpdateLabelsTimer(Sender: TObject);
begin
UpdateStatus;
end;
procedure TGUIThreadInfoForm.SetWindowInfo(ANewHandle, AOldHandle: THandle; lblHandle, lblClass: TLabel);
var
buf: array[0..128] of char;
begin
if ANewHandle = AOldHandle then
begin
lblHandle.Font.Color := ReduceToBlack(lblHandle.Font.Color);
lblClass.Font.Color := ReduceToBlack(lblClass.Font.Color);
end
else
begin
lblHandle.Font.Color := clGreen;
lblClass.Font.Color := clGreen;
lblHandle.Caption := IntToHex(ANewHandle, 1);
if ANewHandle = 0 then
begin
lblHandle.Caption := 'null';
lblClass.Caption := '';
end
else
begin
if GetClassName(ANewHandle, buf, 128) = 0
then lblClass.Caption := SysErrorMessage(GetLastError)
else lblClass.Caption := buf;
end;
end;
end;
function TGUIThreadInfoForm.ReduceToBlack(c: TColor): TColor;
var
r,g,b: Byte;
begin
c := ColorToRGB(c);
r := c and $FF;
g := (c and $FF00) shr 8;
b := (c and $FF0000) shr 16;
if r > 4 then Dec(r, 4) else r := 0;
if g > 4 then Dec(g, 4) else g := 0;
if b > 4 then Dec(b, 4) else b := 0;
Result := RGB(r,g,b);
end;
procedure TGUIThreadInfoForm.UpdateStatus;
var
gti: TGUIThreadInfo;
fg: THandle;
hProcess: THandle;
buf: array[0..260] of char;
tid: Cardinal;
pid: Cardinal;
begin
gti.cbSize := SizeOf(gti);
if not GetGUIThreadInfo(0, gti) then
begin
lblStatus.Caption := SysErrorMessage(GetLastError) + ' ' + IntToStr(GetLastError);
lblStatus.Font.Color := clRed;
Exit;
end;
lblStatus.ParentFont := True;
lblStatus.Caption := 'Ready';
fg := GetForegroundWindow;
SetWindowInfo(fg, FForegroundWindow, lblForegroundHandle, lblForegroundClass);
SetWindowInfo(gti.hwndActive, fgti.hwndActive, lblActiveHandle, lblActiveClass);
SetWindowInfo(gti.hwndFocus, fgti.hwndFocus, lblFocusHandle, lblFocusClass);
SetWindowInfo(gti.hwndCapture, fgti.hwndCapture, lblCaptureHandle, lblCaptureClass);
tid := GetWindowThreadProcessId(fg, pid);
if tid <> FForegroundThreadID then
begin
lblThreadHandle.Font.Color := clGreen;
lblThreadHandle.Caption := IntToHex(tid, 1) + ' ('+IntToHex(pid, 1)+')';
lblThreadHandle.Update;
lblThreadName.Font.Color := clGreen;
lblThreadName.Update;
hProcess := OpenProcess(PROCESS_QUERY_INFORMATION or PROCESS_VM_READ, FALSE, pid);
if hProcess = 0 then
begin
FProcessName := SysErrorMessage(GetLastError);
end
else
begin
if GetModuleFileNameEx(hProcess, 0, buf, 260) > 0
then FProcessName := buf
else FProcessName := SysErrorMessage(GetLastError);
CloseHandle(hProcess);
end;
lblThreadName.Caption := FProcessName;
end
else
begin
lblThreadHandle.Font.Color := ReduceToBlack(lblThreadHandle.Font.Color);
lblThreadHandle.Update;
lblThreadName.Font.Color := ReduceToBlack(lblThreadName.Font.Color);
lblThreadName.Update;
end;
FForegroundThreadID := tid;
FForegroundWindow := fg;
fgti := gti;
end;
end.